Written guide: dulfy.net/2013/09/08/gw2-maste... Video guide showing you how to reach all 17 hidden rooms in world 2 zone 3 for the Master of Secrets World 2 achievement.
With the 2 cows jumping part, You only active the ones THEY DON'T jump om, then once you have done that they will active theres and open the door, no damage and alot faster.
The secret room 6 "Push w" when entering 5 room does not work anymore. You fall every time you enter. Does anyone have another method to get this? They broke something in a patch. I also now spawn on spikes on the 2nd to last checkpoint in tribulation mode, and the final cloud checkpoint didnt work on 2-2.