| Achievement | How to unlock
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| "Beware Planet Earth!" Turbo Prime EX Plus Alpha | Save all the cows on every level of the Story mode in Veteran difficulty.
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| Ain't that a cute little gun? | Survive all five 'Meet the Martians' bonus levels!
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| Bomberman! | Blast at least 8 Martians with one Bomb!
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| Challenge Accepted! | Save all the cows throughout all the Challenges.
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| Challenge Accepted... and Defeated! | Save all the cows throughout all the Challenges in Veteran difficulty.
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| Chekhov's Raygun | Someone's gotta fire it before the end.
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| Flawless Spring | Save all the cows on every Story level of spring.
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| For science...you monster. | Save all the cows on all the 'Meet the Martians' bonus levels.
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| GLaDOS is not gonna be glad! | Witness or cause the collapse of a quantum wormhole.
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| Good Cogs Never Rust | Defeat a Winter Story level without letting one Cog disappear.
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| I MAID A GAM3 W1TH M4RT1ANS!!!1 | Save all the cows throughout the whole 'Maid Raid' Challenge category.
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| Impeccable Fall | Save all the cows on every Story level of fall.
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| Like a Boss! | Repel the Martian threat for good!
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| Martians can't count to three. | Save all the cows on all the 'Meet the Martians' bonus levels in Veteran difficulty.
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| Party time! Excellent! | Save all the cows throughout the whole 'Hard Rock from the Red Planet' Challenge category.
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| Perfect Summer | Save all the cows on every Story level of summer.
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| Save ALL the Cows!! | Save all the cows on every level of the Story mode.
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| Smashing Pumpkins! | Save all the cows on all the 'This is Halloween!' bonus levels.
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| Spotless Winter | Save all the cows on every Story level of winter.
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| Spring Break | Survive spring!
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| Sunset Rider | Survive summer!
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| Teenage Martian Ninja Troopers | Save all the cows throughout the whole 'Ninjas in the Snow' Challenge category.
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| The butterfly effect | Successfully start a chain reaction using 4 or more Explosive Barrels!
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| The Cow is a lie | Behold a Cow going through a quantum wormhole!
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| The Man With the Martian Gun | Get the Zapper.
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| The Old School Republic | Save all the cows throughout the whole 'Back to Basics' Challenge category.
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| The shield is down! | Save all the cows throughout the whole 'Weird Science' Challenge category.
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| They're coming to get you, Barbra! | Save all the cows throughout the whole 'Zombies of Mars' Challenge category.
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| Trick or Treat! | Survive all five 'This is Halloween!' bonus levels!
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| Welcowme on board! | Launch the game for the first time!
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| When you have to shoot, shoot! Don't Talk! | Use the Zapper to finish a Martian.
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| Who you gonna call? | Save all the cows on all the 'This is Halloween!' bonus levels in Veteran difficulty.
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| Winter is coming | Survive fall!
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