The Resistance needs a leader, and that leader is you. Roaming murder gangs of Nazi zombies and serial killers means you need to find cover, build up your defenses, and shoot down the patrols before they find The Resistance hideout and destroy your pathetic rebellion.
Use your mouse to aim and fire.
Press R to reload.
Use W and S to toggle in and out of cover.
Use A and D to roll from side to side behind the barricade.