Red Crucible (Series)!

War Thunder is a multiplayer online game combat flight game developed by Gaijin Entertainment for Linux, Microsoft Windows, Mac OS X, and PlayStation 4.

TrueCombat: Elite is a FREE modification for the Enemy Territory game (also free). It is a realistic modern day FPS featuring state of the art models and textures.

Day of Defeat: Source features multiplayer, team-based gameplay set in the WWII European theatre of operations. Players choose a role and tackle goal-oriented missions based on historical operations.

Welcome to the world of Combat Arms, a free online first-person shooter. Combat Arms has a huge library of modes, maps and weapons that will entertain players of all skill levels from new players to guilds of veterans.

America's Army, the Official U.S. Army Game (AA), provides young Americans with a virtual web-based environment in which they can explore Army career opportunities within an entertaining setting that is tailored to their interests and aptitudes

A.V.A is a MMOFPS set in a modern warfare period, and takes a tactical, realistic approach to combat featuring multiple gameplay modes and real-world gun models.