| Achievement | How to unlock
|
|---|
| +33% (10) | Fully upgrade a weapon before picking up another upgrade box for the same weapon.
|
| 6 bombs (5) | Collect 6 bombs.
|
| 8 bombs (15) | Collect 8 bombs.
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| Easy (20) | Beat the game on easy.
|
| GREAT (50) | Finish stage 1 on easy without dieing.
|
| Hard (20) | Beat the game on hard.
|
| INCREDIBLE (50) | Finish stage 1 on hard without dieing.
|
| iPod (5) | Listen to your own music while playing.
|
| Normal (20) | Beat the game on normal.
|
| Stage 1 (10) | Finish stage 1.
|
| Stage 2 (10) | Finish stage 2.
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| Stage 3 (10) | Finish stage 3.
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| Stage 4 (10) | Finish stage 4.
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| Stage 5 (15) | Finish stage 5.
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| Stage 6 (15) | Finish stage 6.
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| Stage 7 (15) | Finish stage 7.
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| Stealth (10) | Finish a stage without attacking any foe.
|
| Tilt (10) | Use tilt controls for 100 seconds.
|