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