Top similar games like Counter-Strike: Source:

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.

Counter-Strike: Global Offensive (CS: GO) expands upon the team-based action gameplay that it pioneered when it was launched 19 years ago. CS: GO features new maps, characters, weapons, and game modes, and delivers updated versions of the classic CS content (de_dust2, etc.).

With its extensive Tour of Duty campaign, a near-limitless number of skirmish modes, updates and new content for Counter-Strike's award-winning multiplayer game play, plus over 12 bonus single player missions, Counter-Strike: Condition Zero is a tremendous offering of single and multiplayer content.

Battlefield: Bad Company 2™ brings the award-winning Battlefield gameplay to the forefront of PC gaming with best-in-class vehicular combat and unexpected "Battlefield moments." New vehicles like the ATV and a transport helicopter allow for all-new multiplayer tactics on the Battlefield. With the Frostbite-enabled Destruction 2.

The most-anticipated game of the year and the sequel to the best-selling first-person action game of all time, Modern Warfare 2 continues the gripping and heart-racing action as players face off against a new threat dedicated to bringing the world to the brink of collapse.

Take to the streets for intense close quarters combat, where a team's survival depends upon securing crucial strongholds and destroying enemy supply in this multiplayer and cooperative Source Engine based experience.

The new action-thriller from the award-winning team at Infinity Ward, the creators of the Call of Duty® series, delivers the most intense and cinematic action experience ever. Call of Duty 4: Modern Warfare arms gamers with an arsenal of advanced and powerful modern day firepower and transports them to the most treacherous hotspots...

Tom Clancy's Rainbow Six Siege is the latest installment of the acclaimed first-person shooter franchise developed by the renowned Ubisoft Montreal studio.

Black Squad is a free-to-play military first-person-shooter. Players can master their skills and show off their strategies with a wide range of game maps, modes, and weapons to choose from. Join thousands of FPS players worldwide in one of the most played games on Steam!

Valve's WWII Multiplayer Classic - Now available for Mac.

Pushing the boundaries of what fans have come to expect from the record-setting entertainment franchise, Call of Duty®: Black Ops II propels players into a near future Cold War

Also contains all multi-player content from Red Orchestra 2: Heroes of Stalingrad

Battalion recaptures the core of classic competitive shooters & refines the ‘classic’ FPS feel for the next generation. Focusing on 5v5 infantry combat, where precise flick shots with your Kar98, covering fire with your Thompson and fluid movement are key to clutching every round for your team.

A PVP tactical FPS about PLANNING & EXECUTION. Sound strategy and good teamwork are essential for victory because new PROCEDURALLY-GENERATED MAPS are delivered every week. You'll face a new tactical challenge every round.

Task Force is a tactical third-person shooter that focuses on close quarters infantry combat.

Pick a class, choose your gun, and dive right in, Ballistic Overkill has no barrier between you and immediate run and gun action. Designed from the outset to be 'pick up and play', Ballistic Overkill is for you regardless of your level of FPS experience.

Splitgate: Arena Warfare is a fast-paced multiplayer shooter that uses player-controlled portals to create a new dimension of arena combat. IGN describes Splitgate as “Halo meets Portal.

Play Evolve for free with Evolve Stage 2! Evolve Stage 2 is a next-generation free multiplayer shooter featuring addictive 4v1 gameplay. One player-controlled monster must evade and outsmart a team of four uniquely skilled hunters.

Squad is a tactical FPS that provides authentic combat experiences through teamwork, constant communication, and gameplay. It bridges the large gap between arcade shooter and military simulation with 100 player battles, combined arms combat, base building, and a great integrated VoIP...

Red Orchestra Series' take on Vietnam: 64-player MP matches; 20+ maps; US Army & Marines, PAVN/NVA, NLF/VC; Australians and ARVN forces; 50+ weapons; 4 flyable helicopters; mines, traps and tunnels; Brutal. Authentic. Gritty. Character customization. And napalm in the morning.

Insurgency: Sandstorm is a team-based, tactical FPS based on lethal close quarters combat and objective-oriented multiplayer gameplay. Experience the intensity of modern combat where skill is rewarded, and teamwork wins the fight.

Contains full Rising Storm content as well!

Warface is a contemporary MMO first person shooter with millions of fans around the world. It offers intense PvP modes, compelling PvE missions and raids that you can challenge with five diverse classes and a colossal customizable arsenal.

ENEMY FRONT is the first truly modern WW2 FPS, featuring stunning visuals, open-ended levels and a richly interactive combat experience that breaks out of the standard model of highly linear scripted FPS experiences, giving the player full freedom to own their playing style.