The player has two primary weapon slots, a handgun slot and can carry up to ten grenades.Weapons may be exchanged with those found on the battlefield dropped by dead soldiers.Medkits scattered throughout the levels or dropped by some foes are used to restore health when the player is injured.Call of Duty also featured "shellshock" (not to be confused with the psychological condition of the same name): when there is an explosion near the player, he momentarily experiences simulated tinnitus, appropriate sound "muffling" effects, blurred vision, and also results in the player slowing down, unable to sprint.Led by Captain Price, Evans and his troops clear the bridge of German soldiers.
As a first-person shooter, Call of Duty places the player in control of an infantry soldier who makes use of various authentic World War II firearms in combat.Under heavy fire, the paratroopers are scattered, leaving Martin in a mixed unit formed from various companies.The mission closes with Martin and his allies seizing a nearby town from German forces. Moody driving from Sainte-Mère-Église to Sainte-Marie-du-Mont along highway N13 to deliver an important message, while fending off German assaults.Thus, the seventh mission has Martin, accompanied by Price, infiltrating the camp and rescuing Ingram in under ten minutes before the arrival of German reinforcements.
In the final mission, Martin's unit takes part in the Battle of the Bulge, successfully securing top-secret documents from a bunker and stopping an attempt by the Germans to reinforce their troops with tanks.
He takes part in a mission to sabotage the Eder Dam, destroying the anti-aircraft guns protecting it.