In Frontline, the player takes on a first person view and fights as an American OSS operative in D-Day. There are six missions in Frontline, each made up of several smaller levels. Briefings take place at the start of each mission, which advance the plot and introduce new characters. The smaller missions take place in a linear path, with the player fighting through towns and countryside, killing enemies and completing objectives. Objectives are explained to the character in a smaller briefing before each level, which prepares the player for that particular mission. The "War Room" serves as the game's main menu, and is reminiscent of Britain's secret underground intelligence bunkers during WWII.