Ravaged

Ravaged Zombie Apocalypse delivers new maps and modes stacked with a wild assortment of super aggressive zombie types. The Player's objective is to collect the necessary parts to repair the escape vehicle and get the hell out of the zombie-infested areas – or die trying. Jump in solo or go co-op as one of the five Resistance classes. The odds are stacked against you with only one precious life to live and equipped with just a skull cracking crowbar at the start. Loot more weapons throughout the maps as well as collect fuel to use the many Ravaged vehicles.

Ravaged is designed with a heavy focus on vehicular combat taking place on vast maps that will have you strategically fighting it out on land and in air with over 40 vehicles and weapons.

Rogue Warrior is a character-driven, first-person-shooter, featuring Richard Demo Dick Marcinko's explosive personality in an action-packed single player campaign, and intense multiplayer combat.

Homefront: The Revolution is an open-world first person shooter where you must lead the Resistance movement in guerrilla warfare against a superior military force.A living, breathing, open world responds to your actions - you and your Resistance Cell can inspire a rebellion on the streets and turn Occupation into Revolution, as oppressed civilians take up the fight.

The only aim in Rust is to survive. Everything wants you to die - the island’s wildlife and other inhabitants, the environment, other survivors. Do whatever it takes to last another night.

America’s Army: Proving Grounds is the official game of the U.S. Army and part of the highly acclaimed America’s Army game series. This free military game focuses on small unit tactical maneuvers and puts you to the test in new America’s Army maps as well as AA fan favorites Hospital and Bridge.

Breach & Clear brings deep tactical strategy simulation to PC, Mac and Linux! Build your Special Operations team, plan and execute advanced missions, and own every angle. Choose your real-world squad -- US Army Rangers, Germany's KSK, Canada’s JTF2, UK SAS, and more -- and take on a variety of foes with different skill-sets and abilities. Learn to approach, engage, and dominate your opponents through superior tactics and training.

Global Operations is a first-person tactical shooter computer game developed by Barking Dog Studios and published by both Crave Entertainment and Electronic Arts. It was released in March 2002. (Wikipedia)

Squad is a large scale combined arms multiplayer first-person shooter emphasizing combat realism through communication, team play, emphasizing strong squad cohesion mechanics as well as larger-scale coordination, tactics, and planning. It features 20 large open maps, vehicle-based combined arms gameplay, and player-constructed bases to create a heart-thumping, visceral gaming experience with split-second decision-making in real-world scale firefights.

Go behind enemy lines with the ultimate modern military shooter. Play as an American sniper dropped in Georgia, near Russian border. Choose your own path to accomplish your missions across an unforgiven open world.

Escape from Tarkov is a hardcore and realistic online first-person action RPG/Simulator with MMO features and story-driven walkthrough.

Black Squad is Free to Play first-person-shooter military game, with Battleye support, dedicated servers, great shooting mechanics and amazing netcode. You can experience 10 different modes from classic to massive multi-play modes. And unlock new weapons and characters with currency given to the player after each match.