| Achievement | How to unlock | Points
|
|---|
- Bang! Bang!! Bang!!! (secret)
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- Can't Touch This (secret)
| - Complete a stage without receiving a single hit.
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| - Been bumped into by a supply robot.
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- Housing Crisis at Area 51
| | |
| - Completed all campaigns under noob difficulty.
| |
| - Completed all campaigns under normal difficulty.
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| - Completed all campaigns under veteran difficulty.
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| - Scored 2,500,000 points or more during any single stage.
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| - Played in Local CO-OP Mode.
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- The golden medal of Noob: Part 1 (secret)
| - Defeat all enemies in Stage 1(Noob).
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- The golden medal of Noob: Part 2 (secret)
| - Defeat all enemies in Stage 2(Normal).
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- The golden medal of Noob: Part 3 (secret)
| - Defeat all enemies in Stage 3(Noob).
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- The golden medal of Normal: Part 1 (secret)
| - Defeat all enemies in Stage 1(Normal).
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- The golden medal of Normal: Part 2 (secret)
| - Defeat all enemies in Stage 2(Noob).
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- The golden medal of Normal: Part 3 (secret)
| - Defeat all enemies in Stage 3(Normal).
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- The golden medal of Normal: Part 4 (secret)
| - Defeat all enemies in Stage 4(Normal).
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- The golden medal of Normal: Part 5 (secret)
| - Defeat all enemies in Stage 5(Normal).
| |
| - Defeated the Lord of War.
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- The Roaring Steam (secret)
| - Defeated the Roaring Steam.
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