Ion Assault
Complete each achievement to receive the allotted gamerscore.
Abstinence (10) – Complete a stage without collecting a Power-Up.
Allied Victory (40) – Complete the cooperative campaign.
Battleship (10) – Destroy five asteroids at once.
Destroyer (10) – Destroy seven asteroids at once.
Hyperspeed (15) – Finish a stage in less than 90 seconds.
Jackpot (15) – Score 1,500,000 points in a single game.
Payoff (10) – Score more than 500,000 points in a single game.
Rock ‘n’ Roll (15) – Destroy 50 big obstacles in a single game.
Survivor (10) – Survive 3 stages without dying once.
Triumph (40) – Complete the single player campaign.
Untouchable (10) – Complete a whole sector without dying once.