| Achievement | How to unlock
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| - Kill an enemy with an explosive barrel.
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| - Chug 60 beers in 5 seconds.
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| - Look what the cat dragged in.
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| - Kill a boss with a dynamite.
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| - Kill a boss with a boomerang.
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| |
| |
| - Kill a boss with a shotgun.
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| - Kill Sean before he destroys the earth.
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| - Get 840 points with 1 skateboard combo.
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| |
| |
| - Get 650 points with 1 skateboard combo.
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| - Kill a boss with a knife.
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| - Kill a boss with the golden knife.
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| |
| - Get the best possible ending.
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| - Kill a boss with a minigun.
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