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