Saigon is a Commando style game. You're the commander of a team of US Marines during the Vietnam war. The object is to rescue a number of your comrades being held hostage by the Viet Cong. You are armed with an M16 rifle and begin with three men and five grenades. Extra men are awarded at regular intervals and further caches of grenades are scattered around the battlefield. Releasing the P.O.W.s will increase your number of lives accordingly.