|This product was first available for purchase as part of the Counter-Strike
Source retail package as well as through Steam for those who bought
the Half-Life 2 Collectors Edition retail product or through Steam online
ordering of Silver and Gold packages. Activision held the rights to
the original publishing of Day Of Defeat, not Valve, but it was supposed
to be part of the Steam Source packages but is only scheduled to be
out many months after the HL2 packages were released. The delay was due to the
decision to rework all of the original content of Day of Defeat. It was used by Valve to present new design features on the Source engine, such as high dynamic range rendering and cinematic effects. The game itself revolves around two teams, the US Army and the German Wehrmacht, each with access to six player classes, fighting in a variety of scenarios inspired by World War II engagements in the European Theatre of 1944. Player characters cannot take much damage, and in some circumstances can be killed by a single bullet, forcing players to make use of cover to stay alive. When a player character dies, that player starts a short countdown for reinforcements. When the timer runs out, the player and any friendly players killed in that time respawn into the game at their insertion point as the next wave of troops. All weapons in the game have realistic limits to their use: machine guns must be deployed to maintain accurate fire or to be reloaded, rocket launchers must be shouldered to be aimed and fired, sniper rifles are most accurate when used with the scope and grenades not "cooked off" before release may be easily fled or even thrown back by the opposition. The game was initially released with four maps, although later updates have introduced five new official levels and eight community produced maps supported by Valve. The game's levels are based after real battles in the Allied campaigns in Italy, Sicily and France, such as the Falaise pocket or the beach landings of Operation Shingle at Anzio, as well as entirely fictional battles. Combat can take place in several environments, such as city streets, buildings and sewers. Each online game can sustain a maximum of 32 players.