For those that don't know IWBTG stands for I wanna be the guy. Its a platform style game thats completey and ridulously hard.
http://kayin.pyoko.org/iwbtg/
A link to the site.
For those who have played it i'm currently running two games(upper path,lower path) on medium.
I'm on bowser/wart/willy and mecha birdo.
I remember playing this game. I did most of the upper path (didn't do the Castlevania area) and got stuck on Mother Brain in the lower path.
I've told myself i'm gonna beat it at least once.
Beaten it, hated myself for doing such, still do.
Also not to steal Titan's thread or anything, but there's also a game called: I Wanna Be the Fan Game.
Link down thar.
http://www.moddb.com/games/i-wanna-be-the-fangame/downloads
Yeah I heard about that. I;ve also heard its even harder than iwbtg
This game is the most horrible collection of frustrating experiences to grace mankind to date. But it's sooo fun... :P
I never did beat it...Maybe someday.