Here is the full list of all 57 It came from space, and ate our brains achievements.
Finish block crash site on any difficulty.
Buy all shotgun upgrades.
Place 15 mines.
Reach 75x multiplier.
Buy all plasmagun upgrades.
Place 5 turrets.
Finish block countryside on any difficulty.
Buy all pistol upgrades.
Buy all machinegun upgrades.
Finish block highway on any difficulty.
Buy all rocketlauncher upgrades.
Kill 7 aliens at once.
Kill 1338 crawlers.
Finish block city on any difficulty.
Buy all laser upgrades.
Kill 1000 aliens.
Finish block hospital on any difficulty.
Reach 50x multiplier.
Finish with the highest score in a multiplayer game.
Kill an enemy close to a player with one health.
Die for the first time.
Reach 25x multiplier.
Staying alive while other players are waiting to respawn.
Died 123 times.
Finish block planet on any difficulty.
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 10000 aliens.
Kill 100000 aliens.
Shoot 95471 times.
Make 25.000.000 amount of Coins in total.
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.
Pick up 100 upgrades dropped by the S.W.A.T. Drone.
Finish block navy on any difficulty.
Finish block industrial on any difficulty.
Finish block suburbs on any difficulty.
Finish block scrapyard on any difficulty.
Finish block launchpad on any difficulty.
Finish block ship on any difficulty.
Revive 5 people using medkits.
Use the shield 5 times.
Use the searchlights 5 times.
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