Here is the full list of all 88 I am not a Monster: First Contact achievements.
Get "Space Legend" trophy in the game
Get "Beast" trophy in the game
Save 1,000 civilians
Win 500 battles
Infect 500 humans
Get "General" trophy in the game
Get "Hero In Action" trophy in the game
Get "Monster Mastery" trophy in the game
Get "Ruthless" trophy in the game
Get "Officer" trophy in the game
Get "Perfect Hero" trophy in the game
Recover 10,000 HP
Deal 50,000 damage with bullet weapons
Deal 50,000 damage with energy weapons
Deal 5,000 damage with explosives
Deal 50,000 damage with explosives
Deal 5,000 damage with melee weapons
Infect 100 humans
Kill 1,000 enemies
Save 100 civilians
Complete "Portal"
Complete "Sector 17"
Complete "Old School"
Complete "Mr. X"
Complete "Light in the Dark"
Complete "Dark Side"
Complete "Phoenix"
Complete "Magician"
Complete "Vicious Circle"
Complete "New Hope"
Complete "Stubbornness"
Complete "Laser Power"
Complete "Metro"
Complete "Escape"
Complete "Revelation"
Complete "Indestructible"
Complete "Sisyphean Task"
Complete "The Belly of the Beast"
Complete "Do Not Feed the Animals!"
Complete "Do Not Touch!"
Complete "Plan B"
Complete "Fresh Air"
Complete "Whose Shuttle is This?"
Complete "Death to Earthlings"
Complete "We're Family"
Complete "Black Sheep"
Complete "Call of the Sky"
Complete "Betrayal"
Complete "Ambush"
Complete "Massacre"
Complete "Transformation"
Complete "Diamond Tears"
Complete "On Tiptoes"
Complete "Deadly Party"
Complete "You're Fired!"
Complete "Technicalities"
Complete "Welcome!"
Complete "Last Dance"
Complete "An Otherworldly Hangover"
Complete "Lead Role"
Complete "Laser’s Fist"
Complete "Creature From Space"
Get "Hero Certificate" trophy in the game
Deal 5,000 damage with bullet weapons
Fill the morale bar 10 times
Kill 100 enemies
Remove infection 3 times
Deal 5,000 damage with energy weapons
Deal 1,000 damage with melee weapons
Win 20 battles
Recover 1,000 HP
Get "Rescuer" trophy in the game
Save 10 civilians
End the battle without getting Guilt
Get "Cruelty" trophy in the game
Kill 10 enemies
Win for the monsters without dying
Infect 5 humans
Recover 100 HP
Turn a hero into a monster
Win 5 battles
Get "Soldier" trophy in the game
Deal 100 damage with explosives
Deal 100 damage with melee weapons
Deal 100 damage with energy weapons
Use heroic ability 5 times
Deal 100 damage with bullet weapons
Win for the humans without dying