| Achievement | How to unlock
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| - In any single level, purge at least 150 enemies, killing a minimum of 50 with each weapon type.
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- Aint No Rookie ( 10 points )
| - Complete the boot-camp without taking damage.
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- All Hail The G Man ( 50 points )
| - Complete 40 pages of endurance in hard mode.
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- Army Of One ( 50 points )
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| - Use a launcher weapon to kill 10 martians in a single blast.
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| - Complete the game in all three difficulty settings.
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| - Purchase the lightning gun.
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- Fully Loaded ( 40 points )
| - Get 2000 rounds of ammo into your minigun.
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- Getting Started ( 10 points )
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| - Complete 10 pages of endurance in easy mode.
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| - Upgrade all three weapon-types in a single visit to a vending machine.
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| - Collect all meteor rocks in a chapter.
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- Home Coming ( 20 points )
| - Complete the army-base chapter.
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| - Purchase the plasma launcher.
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- Martian Purger ( 30 points )
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- Mean Streets ( 30 points )
| - Complete the city chapter.
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| - Complete 20 pages of endurance in normal mode.
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| - Complete a level without firing a weapon or receiving any damage.
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| - In story mode, city chapter, defend one spot turning left and right, but don't move for 2 mins.
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- Rush-a-holic ( 40 points )
| - Grab all rush crates in story mode.
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- Space Marine ( 10 points )
| - Complete the Moon chapter.
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- Super Market Sweep ( 40 points )
| - Buy all available items in a single visit to a vending machine.
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| - Purge 50 enemies in a single beam-attack (one press of the fire button).
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- To The Teeth ( 30 points )
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- Vending Machine Ping Pong ( 30 points )
| - In story mode, army-base chapter, access both vending machines, alternating between them 5 times.
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