| Achievements | How to unlock |
| Barren (20 points) | Destroy all mushrooms on the screen Centipede - Default difficulty.
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| Entity (20 points) | Have 3 lives in hand Millipede - Default difficulty.
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| Eradicate (20 points) | Reach wave 8 without a millipede reaching the bottom Millipede - Default difficulty.
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| Exterminate (20 points) | Reach wave 8 without a centipede reaching the bottom Centipede - Default difficulty.
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| Lunatic (20 points) | Score 25,000 points Millipede - Throttle Monkey mode.
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| Maniac (20 points) | Score over 15,000 Centipede - Throttle Monkey mode.
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| Marauder (10 points) | Score 125,000 points Millipede - Default difficulty.
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| Poison (20 points) | Destroy a spider for 1800 points Millipede - Default difficulty.
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| Prowler (10 points) | Score over 41,916 to get on the high score table Millipede - Default difficulty.
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| Slayer (10 points) | Score over 16,543 points to beat the high score table Centipede - Default difficulty.
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| Spirit (20 points) | Have 3 lives in hand Centipede - Default difficulty.
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| Stalker (10 points) | Score over 50,000 points Centipede - Default difficulty.
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