| Achievement | How to unlock
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|---|
| 2 TIMES IN A ROW | Choose one up instead of new weapon.
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| A FRIEND OF MINE | Played coop mode.
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| A.A.G. | Sixth level completed.
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| AIN'T NO SUNSHINE | When sh... Fifth level completed.
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| DRUGS ARE BAD, M'KAAY? | Unlock secret ending.
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| EASY PEASY | First level completed.
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| FROM BEHIND | Seventh level completed.
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| FUCKING TINY PLANET | Fourth level completed.
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| HAWAII CLUB | Third level completed.
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| HOLY SHIT, MAN | Completed the story mode on Xtreme mode. You are crazy, seriously.
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| I HATE VIOLENCE | Killed 1000 enemies.
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| MOTHERSHIP | Completed the story mode.
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| OH BABY! | Choose new kind of weapons.
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| ONE. MORE. TIME. | Died 50 times.
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| POWERED'UP | Catch 10 powerups.
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| SOMETHING EXTRA | Unlocked secret mode.
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| WARMER THOUGHTS | Second level completed.
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| WHAT'S THE RUSH? | Finished the boss rush.
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