Here is the full list of all 57 It came from space, and ate our brains achievements.
Finish block ship on any difficulty.
Kill 10000 aliens.
Finish block launchpad on any difficulty.
Finish block scrapyard on any difficulty.
Finish block suburbs on any difficulty.
Pick up 100 upgrades dropped by the S.W.A.T. Drone.
Finish block industrial on any difficulty.
Finish block navy on any difficulty.
Finish block planet on any difficulty.
Finish the first six levels on insane.
Finish block crash site on any difficulty.
Finish block countryside on any difficulty.
Reach 75x multiplier.
Make 25.000.000 amount of Coins in total.
Finish block highway on any difficulty.
Reach 50x multiplier.
Kill 1338 crawlers.
Finish block city on any difficulty.
Kill 1000 aliens.
Finish block hospital on any difficulty.
Reach 25x multiplier.
Die for the first time.
Buy all laser upgrades.
Buy all rocketlauncher upgrades.
Buy all machinegun upgrades.
Buy all plasmagun upgrades.
Buy all shotgun upgrades.
Buy all pistol upgrades.
Died 123 times.
Finish the first six levels on easy.
Finish the first six levels on medium.
Finish the first six levels on hard.
Kill 100000 aliens.
Kill 7 aliens at once.
Kill an enemy close to a player with one health.
Staying alive while other players are waiting to respawn.
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.
Finish with the highest score in a multiplayer game 10 times.
Revive 5 people using medkits.
Use the shield 5 times.
Use the searchlights 5 times.
Complete all Campaign levels on Easy
Place 15 mines.
Complete all Campaign levels on Medium
Place 5 turrets.
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