Military

Battlefield Bad Company™ 2 brings the spectacular Battlefield gameplay to the forefront of next-gen consoles and PC, featuring best-in-class vehicular combat set across a wide range of huge sandbox maps each with a different tactical focus. New vehicles like the All Terrain Vehicle (ATV) and the UH-60 transport helicopter allow for all-new multiplayer tactics in the warzone. Extensive fine-tuning ensures that this will be the most realistic vehicle combat experience to date. Tactical destruction is taken to new heights with the updated DICE Frostbite engine.

PT Boats: Knights of the Sea is a naval simulation that places gamers in charge of a mosquito fleet of the Allied Forces, Russia or Germany during the height of World War II. Torpedo and storm-boats, trawlers and patrol ships plough the seas. Their advantage is speed and maneuverability. Suddenly they appear in front of the enemy with devastating firepower and then vanish in the morning haze. They are hard to spot and difficult to catch.

ARMA 2 (Armed Assault 2) is a realistic military simulation game

Rise of Flight is a flight simulator depicting aerial warfare over the Western Front during the First World War. The time line of Rise of Flight currently covers the years from 1916-1918. The included game map covers over 120,000 km² of the Western Front.
Some well-known flyable aircraft are included in the base game (Albatros D.Va, Fokker D.VII, Nieuport 28.C1, SPAD 13.C1), with additional add-on aircraft from 1916 to 1918 available for purchase online.

Operation Flashpoint: Dragon Rising is a first person tactical military game for PC, PlayStation 3 and Xbox 360 developed by British game developer Codemasters. Codemasters have advertised the game as a tactical shooter designed to realistically represent modern infantry combat. It has Single-Player, 4 Player co-op and Multi-Player modes.

Tom Clancy's Rainbow Six: Vegas 2 is an installment in the Rainbow Six series. It is a tactical first person shooter video game and the sequel to Tom Clancy's Rainbow Six: Vegas. It was announced by Ubisoft on November 20, 2007.

Battlefield 1942 is a multiplayer FPS from DICE and EA Games. It's set in various battlegrounds of WWII, where players fight as GI infantry, and have the ability to pilot various vehicles.

Commandos 2: Men of Courage is a 2001 real time strategy game by Eidos

Faces of War is a 2006 world war 2 real time strategy game for the PC

Battlefield 2142 is a 2006 first-person shooter video game developed by DICE and published by Electronic Arts. It is the fourth game in the Battlefield series. Battlefield 2142 is set in 2142, depicting a war known as "The Cold War of the 22nd Century", in which two military superpowers – the European Union (EU) and Pan Asian Coalition (PAC) – battle for the remaining unfrozen land during a new ice age.

Source: Wikipedia