"It's time to practice your marksmanship as you get ready to join the War On Horror. Take aim but take care and make every shot count. Resident Evil: The Mercenaries is coming."
— Facebook app description
The gameplay involved clicking various enemies that pan across a statically situation camera. Game sessions had a time limit and the player had a limited amount of ammo. The also game also a leader board and the common app option to send Facebook friends your score and challenge them to play.