Here is the full list of all 45 Operator8 achievements.
Start The Game
Start The Tutorial
Launch Your Drop Ship To The Triton Surface
Start The Prison Block Level
Finish The Prison Block Level
Start The Laboratory Block Level
Enter The Mine Field
Finish The Laboratory Level
Kill a Telkar Seedling
Kill a Telkar Shaitan
Kill a Telkar Spitter
Kill a Telkar Mongrel
Kill a Telkar Pod or Infected Pod
Kill a Telkar Egg or Infected Egg
Kill a Telkar Grunt or Thrasher
Kill a Telkar Matriarch
Kill a Telkar Seep or Twhack
Pick Up A Pistol
Pick Up A Machine Gun
Pick Up A Shotgun
Pick Up A Grenade Launcher
Pick Up A Sniper Rifle
Pick Up A Laser Rifle
Kick An Enemy
Read All The PDA's In The Tutorial
Read All The PDA's In The Prison Block
Read All The PDA's In The Laboratory Block
Clone Yourself
Use The Shop
Read Any PDA
Pick Up Armor
Pick Up Health
Pick Up Batteries
Pick Up An Oxygen Cannister
Pick Up A Keycard
Pick Up Credits
Throw A Grenade
Accumulate 1000 Credits
Accumulate 10000 Credits
Pick Up A Energy Pistol
Pick Up A Pulse Rifle
Destroy A Freestanding Turret
Destroy A Mounted Turret
Kill a Telkar Floater
Kill a Telkar Stinger