Here is the full list of all 57 It came from space, and ate our brains achievements.
Finish block suburbs on any difficulty.
Shoot 95471 times.
Finish the first six levels on easy.
Finish block planet on any difficulty.
Buy all rocketlauncher upgrades.
Kill 7 aliens at once.
Finish block crash site on any difficulty.
Reach 75x multiplier.
Finish block industrial on any difficulty.
Finish block navy on any difficulty.
Kill 10000 aliens.
Finish block countryside on any difficulty.
Buy all shotgun upgrades.
Finish block highway on any difficulty.
Buy all laser upgrades.
Kill an enemy close to a player with one health.
Use the searchlights 5 times.
Place 5 turrets.
Pick up 100 upgrades dropped by the S.W.A.T. Drone.
Use the shield 5 times.
Buy all machinegun upgrades.
Reach 50x multiplier.
Finish block city on any difficulty.
Buy all plasmagun upgrades.
Place 15 mines.
Kill 1338 crawlers.
Buy all pistol upgrades.
Kill 1000 aliens.
Finish block hospital on any difficulty.
Reach 25x multiplier.
Die for the first time.
Died 123 times.
Finish the first six levels on medium.
Finish the first six levels on hard.
Finish the first six levels on insane.
Kill 100000 aliens.
Staying alive while other players are waiting to respawn.
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.
Finish with the highest score in a multiplayer game 10 times.
Finish block scrapyard on any difficulty.
Finish block launchpad on any difficulty.
Finish block ship on any difficulty.
Revive 5 people using medkits.
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