America - Front
America - Back
Complete each achievement to get the allotted gamerscore.
Unlockable: | How to unlock: |
Exploring Jupiter (20) | Make it to Jupiter. |
Exploring Saturn (20) | Make it to Saturn. |
Exploring Uranus (10) | Make it to Uranus. |
Good Start (10) | Get 12,000 points in the first stage. |
Mars Attack (30) | Make it to Mars. |
Mother Earth (30) | Make it to Earth. |
Partnership (10) | Obtain a score of 60,000 during an Xbox Live Co-op game. |
Safety First (10) | Make it to Neptune without losing a life. |
Sharp Shooter (10) | Kill all ships on the first 3 bonus levels. |
Team Work (20) | Obtain a score of 200,000 during an Xbox Live Co-op game. |
Too Good (20) | Win 50 Xbox Live Versus games. |
Tough Guy (10) | Make it to stage 7 without obtaining any bonus weapons. |
Unlockable | How to Unlock |
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