Thread:Vorknkx/@comment-1915529-20120523190003/@comment-1496755-20120527111223

Well, I think you've already missed it. The secret exit was on E4M4 :P

E2's secret exit is in E2M4 - you probably remember a small temple-like structure in the icy part of the level. There is a closed door in the back end but no button to open it. It actually opens when you reach the end of the level - so you just have to find a way to go back (by teleporter or by using a Chaos Device, if you have one).

My favorite level in the episode is E4M7. You'll see it soon ;)