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