Grimrock

Hahaha, I just realized after seeing the Atlas they are both one and the same dungeon. This game is so well made, it's pretty silly of me to have blamed the update on my predicament. I blame putting this great game down for about a couple weeks and marijuanos. Also Obama. Seriously though, thanks!

No, this is the one where the sign reads something like Look closer, sometimes you miss the things right in front of you.

So there's a dungeon in Twigroot, where at the entrance there's a button hidden on the wall you have to press to make it inside. Now I'm trying to get out, and the slab that leads to the exit is gone. I can't find any button or anything to activate it, and I haven't played since the update. Is there...