Which one do you think is hardest game?

Definitely Super Meat Boy. If you're a noob at gaming, Binding of Isaac will trash you about also.

I wanna be the guy

Bit.trip.runner

Super Meat Boy

I wanna be the guy.

I wanna be the guy..

Shit's fucked man.

N+, (from the games on the list, i only played Super Meat Boy, but i didn't find it particularly hard.)

Mushihimesama Futari Black Label

Have only played the first four, so can't comment on the last two... but of those, the ranking of easy to hard is (imo):

1. VVVVVV [very simple game, not overly hard... but AMAZING platforming :D]
2. Super Meat Boy [Some of the later levels are challenging, but it's not too hard for the most part (even less difficult when character-switching). Have beaten it 100% a few times + have several videos on YouTube haha]
3. I Wanna Be the Guy [A mix of "surprise" (artificial) difficulty, and genuinely challenging platforming. It's tougher with save points further spaced out. Have beaten this one 5 times (2x Easy, 2x Hard, 1x VHard]
4. I Wanna Be the Boshy [Playing this one on the 2nd hardest difficulty (forget the title) - tough platforming even when you know what surprises are coming your way, and some extremely tough bosses. Absolutely love this, but have only beaten it once]

Impossible Game.

I want to be the guy, I can't believe this is even open for debate.

I found SMB tough .

Battletoads.

You forgot Cat Mario. :-3

I wanna be the guy

Tried VVVVVVVV demo was so hard i couldnt finish

F9LT9-W89RR-092F7

This :D

Ghosts'n Goblins.