Complete each of the following achievements below to get the allotted gamerscore.

Unlockable

Comeback Kid (10) Come back and win a game from 3 goals behind.
Completist Freak (10) Get 100% in time attack mode.

Don’t Need No Powerballs (25) Win without using a powerball, but you can still pick them up.

Geon King (15) Score 5,000,000 points to be a geon king!
Getting Out More (15) Play on Xbox LIVE at least once.
Gimme Gimme World domination (25) Win 50 Xbox LIVE games.

Hazardous Creation (10) Create a hazard by using a mega-ball.

I’ve Got The Power (15) Use all powerballs on your side of the map in a single match.

Mini-Game Master (25) Complete all 8 mini-games.

Use Your Emotion (10) Win at least once with each emotion.

Variety is The Spice of Life (25) Win at least once in all game modes, including Xbox LIVE.

You’re a Winner (15) Win 5 ranked matches in a row.