Complete first Skull Canyon level

Unlock all checkpoints of a map

Play a Multiplayer match

Prevent Wolff from escaping

Discover the location of the V2 launch site

Uncover Wolff's plan

Covertly kill 25 unaware enemies

Get 100 sniped headshots

Hold off the Russian advance

Send the tank into the river by blowing up the bridge

Snipe an enemy through his eye

Kill an enemy while your rifle fire is masked by a loud sound