Capture an outpost or guard post.

Complete the Game in Crushing mode

Make it to the outskirts of Halebidu in Chapter 5 without using a firearm or explosive

Ask Skeleseer a question

Listen to all optional conversations

Defeat 20 enemies with C4

Defeat 10 enemies with headshots in a row

Defeat 4 enemies with one C4 detonation

Defeat 5 enemies, each one taking damage from a handgun, long-gun, and melee

Defeat 20 enemies blind-firing from cover

Defeat enemies with the vehicle, long-gun, melee, and grenade, in that order, in 20 seconds

Defeat 4 enemies with the vehicle in 20 seconds