Here is the full list of all 57 It came from space, and ate our brains achievements.
Make 25.000.000 amount of Coins in total.
Finish block crash site on any difficulty.
Reach 75x multiplier.
Finish block scrapyard on any difficulty.
Revive 5 people using medkits.
Finish block suburbs on any difficulty.
Finish block industrial on any difficulty.
Finish block navy on any difficulty.
Finish block planet on any difficulty.
Place 5 turrets.
Kill 10000 aliens.
Use the searchlights 5 times.
Finish block countryside on any difficulty.
Use the shield 5 times.
Finish block highway on any difficulty.
Place 15 mines.
Kill 7 aliens at once.
Buy all rocketlauncher upgrades.
Pick up 100 upgrades dropped by the S.W.A.T. Drone.
Buy all laser upgrades.
Buy all plasmagun upgrades.
Buy all machinegun upgrades.
Finish block city on any difficulty.
Kill 1338 crawlers.
Buy all pistol upgrades.
Reach 50x multiplier.
Kill 1000 aliens.
Reach 25x multiplier.
Finish block hospital on any difficulty.
Finish with the highest score in a multiplayer game.
Buy all shotgun upgrades.
Die for the first time.
Staying alive while other players are waiting to respawn.
Kill an enemy close to a player with one health.
Died 123 times.
Finish the first six levels on easy.
Finish the first six levels on medium.
Finish the first six levels on hard.
Finish the first six levels on insane.
Kill 100000 aliens.
Shoot 95471 times.
Finish 1 multiplayer game on insane without dying.
Finish 3 multiplayer games on insane without dying.
Finish 6 multiplayer games on insane without dying.
Finish with the highest score in a multiplayer game 10 times.
Finish block launchpad on any difficulty.
Finish block ship on any difficulty.
Complete all Campaign levels on Easy
Complete all Campaign levels on Medium
Complete all Campaign levels on Hard
Complete all Campaign levels on Insane
Complete Rooftops (Campaign) on any difficulty
Complete Clinic (Campaign) on any difficulty
Complete Alleys (Campaign) on any difficulty
Complete Sewers (Campaign) on any difficulty
Complete Riverside (Campaign) on any difficulty
Complete Cave (Campaign) on any difficulty