The King of Fighters XII

Let me start off first and foremost by stating that the online for this game is dead (and has been so for quite sometime).
1. GRAB A BOOSTING PARTNER - preferibly someone who is willing to leave their xbox on overnight and also owns a turbo controller so you can sleep through this grind. (they cost 20 bucks at gamestop)
***if you dont own a turbo controller you'll have to rely on playing the matches out, so my suggestion would be for you and your boosting partner to break this up into sessions to make it less of a pain.
2. -set up a 2-player online arcade lobby
-Both you and your friend set you're controllers to turbo the "A" button
-sit something on the button so that it stays pressed down
-go to sleep
-when you wake up, you will have played around 100 matches depending on when you started and finished.

*** While going for this achievement, you and your friend can also go for the following achs:
Rookie (10 matches)
Champ (100 matches competed)
Master (300 matches competed)