Beware Planet Earth achievements

3.28%
Chekhov's Raygun
Someone's gotta fire it before the end.
3.28%
The Old School Republic
Save all the cows throughout the whole 'Back to Basics' Challenge category.
3.28%
I MAID A GAM3 W1TH M4RT1ANS!!!1
Save all the cows throughout the whole 'Maid Raid' Challenge category.
3.28%
Impeccable Fall
Save all the cows on every Story level of fall.
3.28%
Winter is coming
Survive fall!
3.28%
Good Cogs Never Rust
Defeat a Winter Story level without letting one Cog disappear.
3.28%
"Beware Planet Earth!" Turbo Prime EX Plus Alpha
Save all the cows on every level of the Story mode in Veteran difficulty.
3.28%
Martians can't count to three.
Save all the cows on all the 'Meet the Martians' bonus levels in Veteran difficulty.
3.28%
Who you gonna call?
Save all the cows on all the 'This is Halloween!' bonus levels in Veteran difficulty.
3.28%
For science...you monster.
Save all the cows on all the 'Meet the Martians' bonus levels.
3.28%
The butterfly effect
Successfully start a chain reaction using 4 or more Explosive Barrels!
3.28%
Challenge Accepted... and Defeated!
Save all the cows throughout all the Challenges in Veteran difficulty.