Games like Counter-Strike: Global Offensive
PUBG: Battlegrounds
PUBG: Battlegrounds is a battle royale shooter that pits 100 players against each other in a struggle for survival. Gather supplies and outwit your opponents to become the last person standing.
Tom Clancy's Rainbow Six Siege
Inspired by the reality of counter terrorist operatives across the world, Rainbow Six Siege invites players to master the art of destruction. Intense close quarters confrontations, high lethality, tactics, team play, and explosive action are at the center of the experience. The multiplayer gameplay of Rainbow Six Siege sets a new bar for intense firefights and expert strategy in the rich legacy of past Rainbow Six games.
Dota 2
Dota 2 is a multiplayer online battle arena video game and the stand-alone sequel to the Defense of the Ancients (DotA) mod. With regular updates that ensure a constant evolution of gameplay, features, and heroes, Dota 2 has taken on a life of its own.
Escape from Tarkov
Escape from Tarkov is a hardcore and realistic online first-person action RPG/Simulator with MMO features and story-driven walkthrough.
Sniper: Ghost Warrior 3
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.
Enemy Front
You’re Robert Hawkins, an American stuck deep in Nazi controlled territory during the height of WWII. It’s up to you whether to fight your enemies face to face, snipe them from afar, or sneak past and sabotage their positions. Join the fight against the evil Third Reich in open-ended missions across war torn Europe.
America's Army: Proving Grounds
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.
Counter-Strike
Play the world's number 1 online action game. Engage in an incredibly realistic brand of terrorist warfare in this wildly popular team-based game. Ally with teammates to complete strategic missions. Take out enemy sites. Rescue hostages. Your role affects your team's success. Your team's success affects your role.
Breach & Clear
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
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)