D2R It's Raining Ber Runes - (Infinite Ber Rune Exploit) 

You've found a subject that is very near and dear to my heart. I've spent a lot of years programming RNG both in business apps and games in a previous career, and a long time teaching the subject in College (36+ years) I was not aware that you could set a game seed in the command line for D2. Wow. So without overriding with a specific seed the game will just generate one using a Timer or something (obviously, you've figured that part out). But the C language implementation of a default RNG() function has an interesting way of operating. Every RNG() call uses the PREVIOUS RNG() results to seed the next RNG() call. The very first RNG() call uses the -seed passed on the command line. So first event rng() result is passed to the second event rng() and so forth. And as you stated the exercise becomes figuring out when the game is calling rng(). Visiting a zone generates an rng() call. (Think of it as a random seed for that level that you visited) and is very easily reproducable. Visiting a shop keeper? Probably not. Unless it is calling rng() to populate items in the shop? Now there is a very very interesting fact to this. You don't have to reproduce all 25 (N) steps to this if you know or figure out one of the values along the way. Lets say the sequence is 10001, 8, 23, 100, 4, 16, 3000 You can follow the exact chain, OR, you could simply initialize the Seed to 16 (in this case) and it will generate 3000 EVERY SINGLE TIME, and be much easier to reproduce. Now, I have a theory, that Brevik and crew used just a regular old, standard RNG() function and didn't do anything custom with it (just a guess) So, you could plug the Seed into a regular old rng() call (whatever -seed you intialized with) and you could use the result as a NEW game -seed and skip the first event you did in your chain. I don't think the exact order you are using really matters. The BER rune is just the Nth rng() call, each using the previous rng() result (or starting seed, in case of the first) I could give you some code and show some demo's if it's an interest to you...

holy damn, that is one crazy video ginger - good work !

Wow, incredible. Tested for myself, works. One thing I'd like to add, I am doing this on my sorc with only 40 FRW from Alders. Only thing I am doing different, is teleporting to the last super chest. So I am guessing skill usage does not manipulate the RNG. Also, there is a guaranteed Shako spawn with this seed. Go to Trav > Bazaar > LK, then hit the skeleton and go right to the armor stand. Easy way to farm a Shako.

Holy crap... dude... you are a Mensch, a savior even. I'm 47, played D2 original back in the day, and have been loving D2R as the evolution of a great game from my youth. That said, I have full time job and dad duties, but still love smashing demons and loot farming. I only play offline (my multiplayer days of LAN parties of Counterstrike, 10 years of WoW raids, WOT shoot 'em up etc are over.) which has severely limited my ability to access some of the runeword-driven meta builds. This -seed command (which can be just plugged into the tile on your desktop, as I already do for "-enablerespec") kicks ass!!! I finally have Ber runes (and thus Jah/Cham/Zod) ON TAP. This is f-ing AMAZING. I'm working on the timing, but I've already scored a couple.... THANK. YOU.

Very cool video changed my perception about how I see the game now. I did what you said and follow the steps and lo and behold I get Ber rune every single time. as I was collecting my bers I decided to go to the black marsh instead of Travincal and changed my pattern a little bit, and I popped the last super chest and I got a Gul rune! however I could not for the life of me replicate it wish I have recorded it...

@GGMentor Thanks for giving proper credits! I'm the author of the video your referenced. It all started when I saw a video posted by Llama about the Mal rune farming. Then I got interested into how map seeds work up to the point where I found a dude in an obscure reddit post that said that a specific Seed on specific /playercount dropped him a Ber rune once or twice. I knew I was onto something. So I spent the whole weekend figuring out how the chest/poppable mechanic works. Turns out it's all about how much distance you walk between the spawnpoint and the distance you make to reach the chest. I was using poppable on my way to the chest to actually have a "tool" to calculate my run/walk distance. So I knew if I tried every combination of distances, I would eventually find the "right spot" for the Ber rune on said settings. And that's what I did, with time and dedication. :P By clicking on specific items on the ground, it helps reproducing the walk/run pattern instead of going "free-form with the mouse". Within a specific loot table of a chest, there seems to be another underlying range for the Quality of the Items. Everything is based on the frames. I was able to get the same Yellow back to back, with the same statistics. Same for Grand Charm Skillers. However, when a Gray item drop in that said frame, it seems purely random (ethereal or not, number of sockets, etc) I might be wrong. I'm a filthy casual player with limited time so I was never able to get Enigma without using external programs (which I can't set my mind to use). However, understanding all the game mechanics and finding a way to use everything the game has to offer and keep grinding, applying target-farming was really a nice puzzle for my mind to solve! Diablo 2 is truly the greatest game of all time.

This was a well put together video and taught me something new about a game I’ve been playing for a couple decades! Great video my guy

I was watching the stream yesterday and didn’t get to the point you locked this down. GG man, now I need to start figuring out my seed for my sorc

I knew it! I said months ago that I was pretty sure I was always getting the same exact drops from my LK armour rack pops. It was just too consistent to be a coincidence. I was like I think the seed has a frame timer. I feel so vindicated. Thank you.

I predict lots of views on this video! Nice work gmm!

This video blew my mind. It's so interesting and I would watch more testing of the variables!

this is really a prime example of what makes humans god-tier creatures. our ability to notice these things and to go off on a limb and potentialize new understandings from it. to go back trial and error to great depths a lot of the times (ridiculous depths with the hope for understanding). crazy tbh.

I always felt like i would see some repeated drops when running LK runs one after the other. But it wasn't ever notable enough for me to be like, " hey, this is the exact same crossbow, yari and gold drop as 15 runs ago."

Nice, I remember this from the rack running in older patches more than 20 years ago. On the original CD version 1.07 patch the TC for MF was unfinished and capped at TC66 and Hell bosses didn't drop any item above TC40, TC meaning treasure chest. The only way of finding elite items was RACK RUNNING. So you had to find your way out with map seeds, game seeds, monster seeds, room seeds and player seeds in order to make a rack drop a certain base item, then run it until it drops unique or set. Not just LK but in every place there were racks with high enough TC (Nihlathak’s temple, act V tunnels, etc). One thing, MF didn't affect rack dropping so you had to reset hundreds of maps, wear as much run/walk as possible and find and click the right spots

Single player drops are somewhat seeded, if you follow a certain pattern / timing of looting stuff, it will drop the same items. Same as Diablo 1, checked it out by save state before slaying a unique monster, did a countdown on every load state (1,2,3,4,5,etc) and the same items would drop everytime,

New title: Infinite level 30 rare Martial Arts+Life+Mana Amulet Exploit

-seed in target line changes the way game does randomness. You can test this by removing the -seed from target line, but enter the game with the same char (so you have the same map) and now try to replicate the results. In speedrunning we call this active and inactive seed. Active seed drops can be easily manipulated, but with seed inactive this kind of loot manipulation is not possible.

I have always felt this on single player. You get that great meph map and you run him exactly the same way and I kept getting all the same drops (balrog blades in my case). Very cool.

It’s awesome that you got so deep into this topic. I had noticed this exact thing years ago with a Shako, Harlequin from an armor rack. I didn’t figure out the exact pathway, however I was able to replicate it a few times over countless attempts. I ended up stopping as I didn’t care at that time. Every map and character loads different maps, so this isn’t able to be replicated for every character unless this specific map is loaded. Also, I’ve taken consideration that depending on what you have done prior to getting to this point changes every outcome… example is, if you killed meph already vs not. So many factors and variables without knowing how it gets to that outcome. I love it!

This video was so good, I was away from D2R for a while, now you're making me actually want to create a single player character and load it with Ber runes just to have the feeling of it lol

Holy Shit! This explains a lot of patterns I have noticed while farming Lower Kurast. I tend to farm a specific pattern because of efficiency. I have noticed specific skeletons that kept dropping Pul and Fal runes. This opens up a whole new window of thought on how to farm any area to discover the location of an item. Basically, If you open up a million chests the same way, you will never find a Ber rune. Explains perfectly why I have never found a Ber or Jah rune or any high rune from a super chest in Lower Kurast.

Works like a Grand Charm, thanks for the video dude! I was able to get it to work 3 times in a row with 25% faster run/walk.

That's crazy thanks for the video!

I love the deep dive thank you.

Crazy. It actually worked. I didn't have tele on my barb so I skipped the skeleton right after the waypoint and that seemed to make the timing line up just fine. I get a Ber almost every time.

This is wild. This games been out how long and people still figuring this stuff out 😂

A sit down with a member of the dev team to explain the workings of everything happening in the background would be amazing. This game is timeless and the fact that every couple months there are new things being found is crazy. I thought the Act 4 unlimited MF easter egg was the last thing that mattered, but knowing more about the complexity of the RNG would be massive for the entire community.

Does the direction from which you approach corpse/chest/etc have any influence? Llama had gone over how to reproduce drops from armor and weapon stands. I wonder if there's any value in modifying your variable with the direction you approach?

You have so much self-control. I would have made about 5 infinities and several CoH’s. This is all very interesting.

So if my map doesn’t match yours do i just need to re roll it by going to NM mode and back into hell until it matches what your map shows?

would this work for d1 3 and 4 also? i know it would be different codes and all but i see the settings have same options.

So basically the seed code is for that particular map layout? If I’m on Xbox I would have to keep restarting until I get that layout and it should work?

Happy Ber day to you, Happy ber day to you HAAPYY ber day too youuuuu

Would love a more condensed or structured video on this the more you research on it.

GGM!!!! You have outdone yourself this time. I will be showing my appreciation immediately! Now if only we could find a similar process for slightly lower runes like Gul or Vex. I personally think that would be worth a big fat Patreon.😁

Holy shit. I was blown away when I saw the Bers dropping, but my jaw absolutely hit the floor when you got the same rare ammy. Awesome video

Confirmed this works perfectly. I was discouraged to learn that the game isn't actually random on the drops, then I thought this probably only applies to LK runs because it's common knowledge that these super chests have specific drop tables. Kudos to you for unlocking this specific ber drop combo.

It’s called rack and chest seeding. There are numbers referred to as seeds that remain the same as long as the situation and layout remains the same. You must approach the tiles from the same side and also the number of monsters in the area affect the drops. You can alter the drops by placing Hydras near the rack in same place same number every time and you can change what consistently drops. I have used this tactic to rack perfect 15ed max resistance sacred targe before. Also 1/1000 is a unique so you can target specific uniques this way to complete your holy grail ;) I play console tho often times. If it’s single player you can literally save your char file to a thumb drive or the cloud and then move items to shared stash and reload your char file and dupe all your items. Using this you can dupe mid or low runes and then cube them up to get all runes/rune words in the whole game Your welcome peeps :)

One of the biggest jaw dropping content I've been witnessing for this game and I'm playing since 2004 gone through all the hacked, duped, bugged and bottled craps of what open/closed bnet has to offer for 2 decades. I claim myself as almost a walking D2 encyclopedia, shamefully lol, yet wow this is jaw dropping. Can't wait to go home and try on my own

That's nuts! Preobably the most impressive D2 vid I've seen!

Hi, I've been working as a sw dev for.. some time, I will try to keep it short & simple: fundamentally, in sw there is no way to generate a truly random number. What is used instead are PRNGs (pseudo-random number generators). You can imagine one as a mathematical formula, which given a number calculates the next one, resulting in an infinite sequence like [56, 81, 63, 31, 42, 17, ... ]. To appear random, generated values have a uniform distribution (say you generate 10K numbers between 1-10, you should end up with each of them appearing ~1000 times - the formula/mechanism inside the PRNG is designed that way). Now, everytime a sw needs to do a "random" decision (which tetris block to send next, will you hit or miss, which NPC animation to play, what monster group to spawn, how much life to roll on an amulet : } ), it will ask the PRNG to generate the (next) value, and run a simple calculation like "if the generated number is divisible by 3 you hit, else not", for a 33% chance "random" event. The PRNGs are usually seeded=initialized with time (number of elapsed ms/cpu ticks since some past date), so that you won't end up with the same sequence of "random" numbers (and in turn with the same sequence of "random" outcomes) everytime you restart your.. game, shuffled playlist, simulation, etc - since given the same seed, the PRNG will generate the same sequence of numbers, no matter how many of them you'll ask for - always the same numbers in the same order. Fixing the seed to a constant value is useful sometimes, say you are procedurally generating stuff, or training an AI on a simulation containing random events and it crashes sometimes™ - you'd want to log the seed number so that you can later re-run the simulation with the same seed, effectively replaying what happened, reproducing the error. tl;dr So here, someone discovered a seed which generates a sequence containing a "drop ber when opening chest" (say number 17) fairly early in the seq (say position 34), then used an util to read this seed value out of the d2.exe process memory, you are then fixing your game's PRNG via launch options to be always seeded/initialized to this value, then doing stuff ingame to cause the game to consume 33 numbers, so the 17 is the next "random" generated value when clicking the chest. Sometimes your "drop ber" is consumed by the game calculating if a mob should successfully hit your merc or not (assuming those two things consume from the same sequence), or by an NPC deciding which way to walk since you've spent too much time in town, sometimes you are "not there yet". Btw, there is a good chance those two identical rare amulets got the same "random" item id assigned (depends on how much effort they've put in making item ids truly unique). Soo, sorry but from my POV crippling/manipulating the game's random number generation mechanics in your favor is not legit.

I have found a way to produce the ber rune (doing the same run) and then continue in the same game to find a gul rune. If anyone is interested, I will try to post a video.

Hi GGMentor thanks for this, I'm tagging onto a reply further down about this working on consoles. As we are limited to refreshing our seeds by changing difficulty, I am presuming there are only so many seeds available and we can match your current seed by resetting enough times? Or are the seeds randomized?

BerBerian. Make it happen GGM.

🤔 Now how does a guy do this on console???

exquisite research...thank you...peace from berlin...

Wow, the mechanics are still being unveiled lo these many years later! Dang I still remember buying LoD day it came out, who knew I'd still be learning about it 20+ years later

It fkn worked ginger, boss level deduction from one ginger to another. You earned a sub.

As someone watching this video, I wonder, is it possible to alter the drop table to drop an Ohm Rune from that particular super chest in LK? I am trying to get my hands on an ohm rune so I can make CTA for my Smiter Pally.

Bro I love you subscribed

after the 2 blue poision amulets u stopped using ur shiver armor skill in town just before taking the waypoint to trav . maybe thats why it changed ... This stuff changes the way ppl will think and maybe even play d2 .. truly rad!

extremely interesting video, thanks for sharing

Do you think the amount of time you spend doing things in D2R which seems to yield higher rewards is an old game parameter or is that new? I know D4 implemented such a practice but is nefarious in that circumstance.

Awesome finding! Now need to find how to drop Tyrael's Might :)

Amazing video. I play d2r on switch now. Would I be able to replicate? Does that seed code always have that map layout?

Okay .. okay okay now THIS is one of THE MOST interesting AND addictive D2 vids I have EVER seen!

Software engineer here. What you are describing at the end about the lists of variable types and them ending up consistently the same for items/monsters/resistance etc sounds alot like there is static enums or lists containing all these values and based on chunks loaded theres a index and so if that chest is set to drop 1 rune and you happen to roll the same index(based on chunks loaded) you will always get RUNE_LIST[158] or RUNE_LIST[159] which is your ith and ber rune. Generating random numbers can be resource intensive especially in the old days when this game was made so its very likely that the number generator is a shared class(singleton) and because of that that's why you end up with all these different values ending up the same. It's because the app uses that shared method to get a "random" index(based off chunks) and uses that value as the index for list of runes, monster names, resistances, etc which would explain why you get predictable results.

thanks mate! I did it with my paladin, players 7, arround 70 run/wal with the aura, and 300 magic find, it works quite well for me :D

My god, this works 100%. i went strictly for the ber rune, with 68% ms. it still worked in the same way, as long as i figured out where i needed to hurry or slow down

I’ve seen people asking questions regarding Xbox version of the game but this isn’t exactly clear. If I keep resetting my hell map until I get this Lk map, will this work the same?

i've read posts about this on reddit too but the problem is that even with the same seed, the corpse isn't there after the skeleton, and the stone stash in front of the hut is randomized for me for some odd reason.. hell difficulty with 87 neccro

I don't understand one thing. Do I have to draw the same map offline as you have? Is only the corrected opening combination enough?

Crazy man. Insane someone somehow figured this out.

can you please check whats the exact time you click on the chest? like how long are u in the game 2:15 etc

Very curious, nice discovery!

have you tried TIMING the run and just opening the chest at the exact time required to get the ber?

i wonder what running the cow run BEFORE rushing these would affect the system

My experience was trial and error even with GGM's advice here. It can be done on a non sorceress which is nice since I don't have one high enough. I did it with my Javizon with a teleportation staff. Was first trying it without setting the players count to 7 since that wasn't part of the given set up. Didn't work. Though that might also be because I actually had over 80% run walk with the Hustle giving me 65% so I had to take some stuff off. Then it all came down to timing. I was still too fast a lot, got the 122 drops or the hatchet instead of the mithril point. But even getting the MP I'd get down to the target chest too soon. I was becoming convinced that you had to take some damage from something to make this work. All in all, after many times trying to get the timing right, I got 6 Bers before calling it a night. I can now make an Infinity!...well once I find a good base. Anyone got a trick for that?! lol (I know, I know...back to Cows/Pit/CS....) Thank you for all the gaming news, tips and tricks and all of that stuff, GGM!

Awesome Video. I didn''t know that D2 actually works like that. Everyone familliar with Speedrunning (especially Pokémon gen1) knows about this kind of RNG manipulation. Cool to see, that this stuff works in other games too😄

Is the main application for online play to, if farming LK chests, interact with skels, corpses, or w/e we see looking for the bonfire first? To improve what the superchests drop? I can't imagine that's a real exploit.

I just stumbled on this, do you know if there is a way to enter the seed if you are playing on a switch?

Is a seed = specific map layout for zone?... im playing on console and dont think im able to force the seed. Could i theoretically keep refreshing maps until i find the same one you were running?

Do you happen to know if this works on Xbox? I dont have a spot to add that exact seed. I would love to finally make my infinity

I didn't know about this mechanic, but last week I found 2 Sur in a span of half an hour and the next day again 2 Sur in about 15 minutes (offline of course). Seems like I have a Sur map and now only need to try to find out what exactly I did on these occasions.

Do you have to make sure it is the exact layout of that map?

Wonder if i got the same map layout on console if this would work since i cant enter a seed

Damn that's interesting. I did some research and I have found a post from 2008 that talks about this. It wouldn't suprise me if some people figured out how the number generator works with the map seed and were able to apply it to multiplayer.

Often times when I get a cool item like a good unique item, I get excited and do the exact same thing I did in a new game and I find it interesting that I get the same good unique item again from the same source. I often joke that I’m about to get another one soon after because of how often it seems to happen. Interesting 🤔

Is this frame generated loot, each frame played since spawn clocks over a loot roll so if, is it time based rather than the variables... Its more the time taken and it just so happens that running that particular way meets the frame requirement for the rune to drop...?

You perfected the technique then? Well done, sir!

Damn i have seen alot of clear screens on youtube gaming videos but yours is amazing!

It’s a good thing you’re constantly recording. Hopefully you do some follow ups with other “recipes/combinations” for unlocking other runes, Great Charms, Small Charms, specific gear etc

Hello GGM, been watching your videos for a while now. So I've watched this video and followed the instructions to the letter but instead of mithril points.. i get hatchets no matter how fast or slow I go to do the process that leads to the weapon rack before the first super chest pop. The only thing I can think of is.. I'm running with an amazon with 75% run speed instead of a sorceress.. I'm wondering if that makes a difference at all. I'm using Naj's Puzzler to tele. Perhaps i need to make a sorc. Another thing I noticed is the drops that spawn from the skele and the corpse are not the same as yours either.. so perhaps it does need to be a sorc. Guess I need to make one.

Can this be done on ps5 or is this only available for pc?

You're on to something, I've always wondered why certain uniques drop more in certain high lvl areas, like finding a diadem or corana in the pits, certain actions/circumstances are being met and the item drops. Players do this unknowingly thinking the drops are random, there's a pattern to the variables.

Hello GGM congratz for this new content! I tried the method and something interesting happened. Following the pattern, there is no mithril point that comes out of the rack but a hatchet. No matters if I speed up or slow down, always the hatchet. BUT, i kept trying different paces and... Amn Rune out of the chest, then an Ith, and couples tries later, the Ber Rune ! That would suggest that the time spent between the rack and the chest is also key, regardless of what drops from the rack.Thought it was worth mentioning to add up to this very interesting topic. Cheers 🥂

Very interesting thanks for sharing

Thx, i now have a surplus of Ith runes... still keeping at it and it seems to count from opening chests, no particular order here but 6 and than the "ber" ith for me chest always drops. Not complaining in the least because this testing got me a 40%ed jewel. gonna keep trying tho =)

pretty much next part is to make a list of seed then 1seed / rune, with if possible something that abrely depend on rng/walking and 1seed / base you might be interested in to farm those might be a stupid question but, i doubt any of this is new can't the data be data mined?

How about magic items, do they always roll the same affixes? So you could theoretically get a +40 life skiller pattern and grind nine of these bastards easily? Or do they roll independently? Which is also good cos you can farm a fuck ton of GC's if you discover a GC pattern?

What if you craft an item without moving, would it roll the same every time?

Here's a question though. I farmed 5 ber's and made 2 into Jah. Put Jah-Ith-Ber in 3 socket chest to make Enigma, but I didnt get the runeword?? Only the +bonus from the runes

Best opening of a video ever! LMAO

So I think it's just events' based. Every event creates a new preloaded set for the next event. "next chest in THIS area (also an event) will give you Y". Basically, all the gear you can find is sent to you based on the information you provide the isp: clvl, mf and the monster's level. Basically, if you can tell us what constitutes an "event" in D2 from your tests, we'd have a greater understanding of how d2 is made! Love the vid. I think changing area, killing monsters (every different type), opening chests/clickables, resplendent chests etc... all constitute preloaded sets. I do think the game generates new loot based on the next events... let us know your findings!

I've been doing lower k runs and got identical amulets recently. Didn't think anything at the time, but now I feel wielded out lol. Crazy.

This is great. When trying this on PlayStation: can you do this with any random LK map? So can I keep my current LK map and try to find a high rune there? And when I have found one I try to replicate this one successful run?

Amazing 🤩

Having "predetermine" drops is almost always true in games. It would be very rare to find a game that does random drop calculation on the fly. This is why we have loading screens. The fact that there is a time during the game play where the drops are calculated and assigned to objects does not make them less randomly generated than if they are calculated on the fly. All it does is shift your perception of "random" because you are either adding or removing the time dimension. Also all of this is based off of your 9 digit seed code, which when you play the game "normally" also changes frequently. Damn interesting video tough!

thx for video, are there other known seeds for top items, skillers, or runes?

I'm surprised you spent time offline for the stream on this. I was gaming so much I didn't even think about YT.