Beware Planet Earth

Welcowme on board!

Common68.8%

Launch the game for the first time!

The Man With the Martian Gun

Common52.7%

Get the Zapper.

When you have to shoot, shoot! Don't Talk!

Common48.4%

Use the Zapper to finish a Martian.

Spring Break

Uncommon29.5%

Survive spring!

Flawless Spring

Uncommon16.5%

Save all the cows on every Story level of spring.

Sunset Rider

Rare13.2%

Survive summer!

GLaDOS is not gonna be glad!

Rare12.3%

Witness or cause the collapse of a quantum wormhole.

Bomberman!

Rare10.7%

Blast at least 8 Martians with one Bomb!

The Cow is a lie

Rare8.8%

Behold a Cow going through a quantum wormhole!

Perfect Summer

Rare8.1%

Save all the cows on every Story level of summer.

Winter is coming

Rare6.5%

Survive fall!

Good Cogs Never Rust 

Rare5.8%

Defeat a Winter Story level without letting one Cog disappear.

Chekhov's Raygun

Legendary4.9%

Someone's gotta fire it before the end.

Like a Boss!

Legendary4.9%

Repel the Martian threat for good!

Impeccable Fall

Legendary3.9%

Save all the cows on every Story level of fall.

Trick or Treat!

Legendary3.4%

Survive all five 'This is Halloween!' bonus levels!

Smashing Pumpkins!

Legendary3.2%

Save all the cows on all the 'This is Halloween!' bonus levels.

Spotless Winter

Legendary3.1%

Save all the cows on every Story level of winter.

They're coming to get you, Barbra!

Legendary2.9%

Save all the cows throughout the whole 'Zombies of Mars' Challenge category.

Save ALL the Cows!!

Legendary2.9%

Save all the cows on every level of the Story mode.

Ain't that a cute little gun?

Legendary2.9%

Survive all five 'Meet the Martians' bonus levels!

For science...you monster.

Legendary2.7%

Save all the cows on all the 'Meet the Martians' bonus levels.

The shield is down!

Legendary2.6%

Save all the cows throughout the whole 'Weird Science' Challenge category.

Party time! Excellent!

Legendary2.6%

Save all the cows throughout the whole 'Hard Rock from the Red Planet' Challenge category.

The butterfly effect

Legendary2.5%

Successfully start a chain reaction using 4 or more Explosive Barrels!

The Old School Republic

Legendary2.3%

Save all the cows throughout the whole 'Back to Basics' Challenge category.

Teenage Martian Ninja Troopers

Legendary1.9%

Save all the cows throughout the whole 'Ninjas in the Snow' Challenge category.

Who you gonna call?

Legendary1.8%

Save all the cows on all the 'This is Halloween!' bonus levels in Veteran difficulty.

I MAID A GAM3 W1TH M4RT1ANS!!!1

Legendary1.8%

Save all the cows throughout the whole 'Maid Raid' Challenge category.

Challenge Accepted!

Legendary1.7%

Save all the cows throughout all the Challenges.

"Beware Planet Earth!" Turbo Prime EX Plus Alpha

Legendary1.7%

Save all the cows on every level of the Story mode in Veteran difficulty.

Martians can't count to three.

Legendary1.6%

Save all the cows on all the 'Meet the Martians' bonus levels in Veteran difficulty.

Challenge Accepted... and Defeated!

Legendary1.3%

Save all the cows throughout all the Challenges in Veteran difficulty.