the hardest song for Audiosurf

Darude - Sandstorm

Necrophagist - Foul Body Autopsy

gogogo - quick brown fox play on ninja mono iron mode have fun

If by Mindless Self Indulgence.

I don't really think there's any way of knowing. Personally I haven't tried the game yet. I would be interested to know how Merzbow - Slave New Desart plays.

Try this

Well I just failed miserably to "Such The Fool" by SikTh. I'm sure there's harder out there, but they are pretty erratic so the game speeds up and slows down quite often.

m1dy - cold pizza

Terrormasta - BrainBrainBrainBrain

Anything speedcore really is completely batshit insane.

bump

NOFX - The Decline

Basically, you're asking for the longest and most upbeat song, which is a neverending (nearly?) spiral upwards. Someone will always (almost?) have something faster/longer.

So, a good place to start is Through the Fire and Flames by DragonForce. Cool song to listen to while you play, too. If you're into metal, that is.

my fav has always been Invaders Must Die, not difficult but still pretty good