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