@@Party_noob892 some of the dvn maps are sitting in roblox studio. just go search "dummies vs noobs" in the creator marketplace. problem is you can only see it when you check "unverified creators".
you need to own a certain badge to get this difficulty (no longer obtainable because someone leaked the puzzle) but you can play with someone who already have the badge
this is my first seeing somebody beat wave ultima IN ANY GAME ((decaying winter wave ultima is impossible cuz of hidden wave and Death squad wave for me(also decaying winter is an old game that got terminated like 1-2 times idk but still nobody has beaten wave ultima there so yeah))