Kill 50 Enemies with the SAS-12

Kill 3 enemies simultaneously with the Knife

Obtain a silver medal in 10 different challenges

Kill 30 Enemies with the RPG-7

Accumulate a total Wrecking combo of 1,000 in Demolition mode

Survive to see the dawn of the 5th day in Survival mode

Lifetime total of 1,000 humans saved in Survival mode

Kill 50 Enemies with the Dragon Sniper

Kill 50 Enemies by Melee-Attacking from Behind

Kill 50 Enemies with the M4

Destroy 10 consecutive Sentinels before they escape in Survival mode

Kill 100 Enemies with Headshots