Buy Combined Arms Operations Series PC key

Combined Arms Operations Series (CAOS) is a turn-based strategy game about operational-level combat between World War II armies. You command forces from Germany, the Soviet Union, the United States, Britain, Italy and France across the years 1939–1945. Its scenarios range from small battles between a couple of divisions that take under an hour to play, to army-level engagements with dozens of divisions and hundreds of units that can span several days.

Plan your operations

CAOS resolves turns simultaneously, or WeGo, and features highly mobile combined-arms combat. You can use armored spearheads to break through enemy lines and create encirclements, send commandos through mountains to disrupt supply lines, and attack with artillery and aircraft. You can also destroy bridges, build fortifications and minefields, conduct paratroop drops, and launch amphibious invasions. As the battlefield changes, you must adapt your plans and try to outmaneuver your opponents.

Reconnaissance units and aircraft help you watch your flanks and track enemy movements through the fog of war. Scenarios use randomized objectives and starting zones, and four game types cover engagements from small meetings to full-scale amphibious invasions.

Organize your forces

You can reorganize historical divisions to suit your command style, retrain units, or combine units across divisional lines into custom battlegroups. This lets you recreate historical formations or experiment with alternative force structures. As your army takes losses and reserves diminish, you can also form new battlegroups from the remaining units.

The game includes 4,468 units, detailed down to individual tanks, artillery pieces and rifle squads, as well as 580 historically accurate division and brigade formations. You can field tanks, infantry, artillery and aircraft, use long-range artillery for fire support or bombardment from many hexes away, and choose between blitzkrieg and attrition tactics.

Game modes

CAOS offers single-player, synchronous head-to-head PvP and two-player co-op. In multiplayer scenarios, you can see your ally issue orders in real time, coordinate battle plans and transfer control of units between players.