Here is the full list of all 57 It came from space, and ate our brains achievements.
Died 123 times.
Finish with the highest score in a multiplayer game 10 times.
Finish the first six levels on insane.
Finish 6 multiplayer games on insane without dying.
Shoot 95471 times.
Finish 3 multiplayer games on insane without dying.
Finish 1 multiplayer game on insane without dying.
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.
Finish block industrial on any difficulty.
Finish with the highest score in a multiplayer game.
Finish block navy on any difficulty.
Revive 5 people using medkits.
Staying alive while other players are waiting to respawn.
Finish block planet on any difficulty.
Finish the first six levels on medium.
Buy all rocketlauncher upgrades.
Finish block crash site on any difficulty.
Pick up 100 upgrades dropped by the S.W.A.T. Drone.
Buy all laser upgrades.
Place 15 mines.
Finish block countryside on any difficulty.
Buy all plasmagun upgrades.
Place 5 turrets.
Use the searchlights 5 times.
Finish block highway on any difficulty.
Reach 75x multiplier.
Kill 1338 crawlers.
Reach 50x multiplier.
Kill 7 aliens at once.
Buy all shotgun upgrades.
Use the shield 5 times.
Die for the first time.
Finish block city on any difficulty.
Buy all machinegun upgrades.
Kill 1000 aliens.
Kill an enemy close to a player with one health.
Finish block hospital on any difficulty.
Reach 25x multiplier.
Buy all pistol upgrades.
Finish the first six levels on easy.
Finish the first six levels on hard.
Kill 100000 aliens.
Make 25.000.000 amount of Coins in total.
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