It's 3 in the mornin' and I'm bored again.

My friends, I have played Toilet in Wonderland. And I am terrified.

http://memoriesoffear.co.vu/post/72682203855/toilet-in-wonderland-is-an-adventure-game-where-a

Also, on the same engine are Ib, Witch's House, and Mad Father, which are phenomenal.