Mission Against Terror

Mission Against Terror, also known as M.A.T, is a multiplayer, free-to-play FPS. Launched into closed beta by Suba Games on September 3, 2010, it quickly got the attention of many MMO media sites to giveaway closed beta keys. Mission Against Terror entered into open beta on September 19, 2010, followed by its commercial launch on July 8, 2011.
Gameplay.
"Mission Against Terror" is similar to commercial games such as "Counter-Strike", "Call of Duty", and "Ghost Recon 2". The game offers quite a few different modes of gameplay including deathmatch and team deathmatch, along with unique game modes against computer-controlled bots such as AI Mode, Dragon Emperor Mode, Hybrids, Inferno(I-II), Bounty Mode, Snake mode, Phantom Team, Mummy mode (Hero), Inferno II, Hide & Seek, Mummy mode and more. "Mission Against Terror" includes a variety of real-world weaponry, like the FAMAS, M4A1, AK47, Heckler & Koch HK416 the Heckler & Koch MP5.
The Arrow keys ←↑↓→ and [AWSD] controls movements while the mouse is used to look around and aim.