Stock Incredible (Great, Good, OK, Bad, Unplayable):
FF7: Works good, sound is best I have heard too.
Tony Hawk's Pro Skater 4: Good framerate, but the textures are really mess up. The sound is pretty good.
Twisted Metal 4: The screen only fills up half of my phone and you need R2 to play. Don't get this!
Madden 99-2003 (NCAA too): Does not get past the EA Sports intro.
Madden 98 (NCAA too): Does not load games after the menu.
Blitz 2000: Player models don't load, shadows do though. Playable I guess.
NFL Gameday 2002: Works great, sound is a little messed up, but it didn't bother me. Finally a football game that works!
Metal Gear Solid: Won't start the beginning introduction movie.
Crash Bandicoot: Good framerate, sound is OK.
Spyro: Works very well, sound is actually pretty good too.
Resident Evil 3: Everything works good, just make sure to mess with the controls so that it is playable.
Gran Torismo 2: Single player (time trials) work well, but with multiple cars, the game lags too much. Sound is bad too.
Tekken 3: Won't start.
NFS 3 Hot Pursuit: Works great (unlike Gran Torismo 2), sound is alright. Tilt controls work pretty well too if you want to use them.
Tony Hawk's Pro Skater 3: Wont' start.
Crash Team Racing: Only sound plays for me.
Tony Hawk's Pro Skater 2: Same as 4--good sound, but textures are all funny. Very playable though.
Medal of Honor Underground: Probably the best one yet. Everything works great, however, the game itself is just "OK".
Grand Theft Auto 2: Similar to Blitz--the cars don't load, but it is playable I guess.
Digimon World 3: Works well, sound is funky at times.
Madden 2005: Won't get past the EA intro.
Grand Theft Auto: Works really well. Sometimes the music doesn't work, but other than that, it is great!
Tony Hawk's Pro Skater 1: Same as 2 and 4.