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

Defeat 4 enemies with the vehicle in 20 seconds

Open every lockbox

Defeat 4 enemies with one C4 detonation

Plant multiple C4 charges on the APC at the same time and destroy it with one massive detonation

Use every gun in the game

Take a photo at all the photo opportunities

Defeat 20 enemies blind-firing from cover

Defeat 20 enemies firing from-the-hip

Find 35 treasures

Pick a three pin lock in under 15 seconds

Defeat 5 Guardians With a Sniper Rifle