Here is the full list of all 50 Lost Planet 3 achievements.
Found all Mementos.
Finished the Game on Any Difficulty.
Stopped Isenberg for Good.
Watched Coronis Fall.
Defeated Laroche.
Discovered the Lost Contractor's Fate.
Found 50% of Logs.
Found a Memento.
Discovered Nushi.
Restored the Fueling Depot.
Killed the Gorevorgg.
Took Storm Readings.
Found a Mysterious Structure.
Killed a Cat-G Akrid with the Rig.
Returned the Medicine.
Opened the Armory.
Stopped the Akrid infestation.
Completed Deep Core Drilling.
Purchase First Rig Upgrade.
Brought the Com-Dish Online.
First Weapon Upgrade Purchased.
Planted your First T-Post.
Rescued the Trapped Scientists.
Secured the Moorings.
Emptied your First T-Post.
Defended Laroche.
Got your Rig.
Found a Log.
Saved by Laroche.
Finished the Game on Hard Difficulty.
Planted every Post.
Bought every Weapon and Rig Upgrade.
Fully Unlocked Bestiary.
Found all Logs.
Finished Kovac's Quests.
Tagged an Albino Tarkaa.
Purchased all Ethologist Upgrades.
Won a Multiplayer Match.
Won 25 Multiplayer Matches.
Won every Scenario.
Perform your first Stealth Kill in a Multiplayer Game.
Delivered The T-Eng Canister 2 times during a multiplayer Outpost Scenario match.
Killed 20 Wardeyes during a multiplayer Research Lab Akrid Survival match.
Delivered the T-Eng Canister 3 times during a multiplayer Alpha Lair Scenario match.
Destroyed Satellite Array.
Get a kill while on the Battlecat.
Delivered the T-Eng Canister to win a multiplayer Quarantine Scenario match.
Unlocked Sphere Cell.
Unlocked 30 Sphere Cells.
Unlocked all Sphere Cells.