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