Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Finisher (5 points): Knock out an opponent using a Super Shot.
Destroyer (10 points): Knock out opponents using each character's Super Shot.
Party Time! (15 points): Play in a game with eight players on Xbox LIVE.
50 Wins (25 points): Win 50 games in any mode.
20 MVPs (25 points): Be the MVP player 20 times in any mode.
Double KO (15 points): Knock out 2 or more opponents at once using the Shooter's Super Shot.
Perfect Player (25 points): Win a match on Xbox LIVE without getting knocked out.
Perfect Team (35 points): Win a 6 vs 6 Xbox LIVE round without any teammates getting knocked out.
Arena Master (15 points): Play at least once on each arena.
Ball Master (10 points): Use each ball in a game at least once.
Line Master (10 points): Play at least once with each line and each ground variation.
Ranked Veteran (10 points): Win at least 5 ranked matches on Xbox LIVE.