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