Here is the full list of all 49 Alien Rage - Unlimited achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Get the most kills AND never die during a single multiplayer match
Get the most kills during a single multiplayer match
Complete single player campaign on Brutal difficulty
Complete single player campaign on all difficulty levels
500 Kills With Explosions
Complete single player campaign on Hard difficulty
Play entire campaign using only the pistol
Play entire campaign using only 1 weapon
Find all audio recordings
80 Kills While Piloting Mech
25 Kills Using Mech To Step On Enemies
500 Total Headshots
Completely recover from damage 3 times during a multiplayer match
1000 Promethium Containers Destroyed
Complete single player campaign on any difficulty level
Complete single player campaign on Normal difficulty
Defeat Vorus God Mech
Defeat all Bosses
Reach a player score of 50,000,000
Defeat DF9 Sentry Mech
250 Kills With Melee
Unlock all player perks
Destroy the security control room
Kill an enemy with every weapon
Use all weapons
Use every weapon’s secondary fire mode
Find all weapons
Defeat Vorus Primus
1500 Total Kills
Set the docking tower centrifuge to overdrive
Defeat GX-7 Destroyer Prototype
Defeat AA-19 Combat Mech
Play as an alien in a multiplayer game
Never die during a single multiplayer match
Reach a player score of 25,000,000
Defeat Mk XII Heavy Mech
Defeat Vorus Gladiator
Survive the Heavy room
Win 10 multiplayer games
Play as a human in a multiplayer game
Join a multiplayer game
Defeat Security Turrets
Take out the bunker
Unlock first Perk
Defeat Vorus Centurion
Lower the bridge
Find a new weapon
Find an alien weapon
Use any weapon’s secondary fire mode