Defeat the mech in "Harvest Season"

Complete mission 1: "Homecoming"

Kill an enemy by dropping a structure on them.

Kill 10 enemies with grenades by aiming while hanging from a ledge

Kill 20 enemies melee-attacking from behind

Kill 50 enemies with the Micro - 9mm

Kill 100 enemies with headshots

Defeat 75 enemies in a row without dying

Defeat 30 enemies with the PAK-80

Find all 100 treasures

Defeat 20 enemies while swimming

Defeat four enemies with one explosion