Audiosurf 
Guitar Hero III Overall Comparison Auidosurf Is a game that a friend bought me through steam (an online gaming community which also sells games). I played the demo before hand and this game blew my mind. I Immediately loved how you could choose any song on your computer, and turn it into a "roller coaster" to ride on. You catch little colored squares (and sometimes dodge gray ones ... ninja mono has like a bagilion gray ones... ) match up together like a puzzle and earn points. Everything around you while running on the track goes with the beat and melody of the song your playing. And you can compete with other peoples scores online (for free I might add).
Guitar Hero 3....2... and 1.... Not as good. I mean it was challenging at times on some guitar solo's which made it fun like "through the fire and flames" or "one" on expert. but they didn't give you the option to choose songs off anything else but the setlist and bonus list. and there is really no challenge when it come to easy songs, just strum and move your fingers.
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Comments
Guitar hero canon was great, I could pick it up right now and still have tons of fun, its more simplistic, but it offers a good variety of songs, and you could choose your own music, but only for the 360 and ps3 editions, where online was avalable, most of the time you had to download a set of songs, but even the selection was amazing (i.e. Halo guitar remix, Top Gun theme) cover bands that are new to the music world, and more... It still offers great fun, and I have the game for ps2, which means I can't download my own music, but that doesn't bother me
Also, being colorblind, the only mode I ever play on is Ninja Mono, otherwise it's near impossible for me.
I really have no idea which one to vote for.
...But I got bored of GH3 really fast.
(Rock Band FTW!)