Finish episode 0

Complete the game in Hard or Realistic difficulty.

Kill the Traitor with a melee attack.

Complete Dam level without equipping a weapon on person (mounted weapons are allowed).

Complete Swamp Mission.

Complete Rebellion Mission.

In Bunker, make the Mercs and the caged Trigens mingle with each other

Collect the Key card in Research without alerting anybody!

Score 1 kill each from a land, maritime and aerial vehicle.

Get a headshot kill from 500m.

Complete a level with full health and armor.

Run over 5 enemies while driving a vehicle.

Unlocked all Book of Fables entries in Episode 5.