| Achievement | How to unlock
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| - Complete a campaign without destroying a room.
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| - Complete a mission without losing a Deadnaut.
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| - Complete a campaign with a rating of Excellent or better.
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| - Kill 15 enemies using hacked Sentinels.
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| - Complete a mission without destroying a room.
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- Game Over, Man! Game Over!
| - Complete a campaign featuring portals and fast-moving aliens.
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| - Encounter the ghost of a deceased Deadnaut.
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- Grizzled Destroyer Of Aliens
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- Intergalactic Critter Slayer
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| - Kill a zombified Deadnaut.
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- Oh, You're Alive. That's Nice...
| - Rescue a captured Deadnaut.
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| - Complete a campaign featuring madmen or horrors.
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| - Complete the last mission of a campaign with a crew of cloned Deadnauts.
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| - Complete a campaign featuring undead mutants.
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| - Start and complete a mission with a single Deadnaut.
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- Terminate, With Extreme Prejudice
| - Complete a campaign featuring enhanced soldiers with firearms.
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| - Complete a campaign without losing a Deadnaut.
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| - Complete a campaign featuring incorporeal entities.
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| - Teleport a Deadnaut to another room by entering a portal.
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