Day of Defeat

Day of Defeat is Valve's WWII team shooter, built on the GoldSrc engine after starting life as a Half-Life mod. Players join the Axis or Allied side and pick from light, assault, or heavy infantry, plus sniper and machine-gunner classes, each carrying a different period-accurate loadout.

Maps are modelled on key operations of the European Theatre, with objective-based play rather than pure deathmatch — squads work together to capture flag points or complete mission-specific goals.

It's an older, slower, deliberately less twitchy take on the team shooter than Counter-Strike, leaning on suppressive fire, sightlines, and the punishing recoil of weapons like the BAR and the MG42. There's no single-player campaign; the entire game is the multiplayer.