Top similar games like Counter Operation Online:

Black Ops Cold War, the direct sequel to Call of Duty®: Black Ops, will drop fans into the depths of the Cold War’s volatile geopolitical battle of the early 1980s.

Call of Duty®: Vanguard includes a deeply engaging single player Campaign, a massive Multiplayer offering featuring over 20 maps including 16 built for core Multiplayer and an exciting new Zombies experience developed by Treyarch.

Fittest is a semi-realistic military looter-shooter where you are tasked with entering zones and looting the items needed for your survival. Choose to be stealthy and avoid combat or go loud! The choice is yours! Regardless of the path you choose, you will need to be the fittest to survive!

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!

Condition Zero,Where you can play multiplayer and frag players or play zombies and survive wave of zombies.

Total Havoc is a fast paced FPS game that offers loads of fun across many maps and modes. A true must play for all FPS enthusiasts. Where FPS meets two worlds and teleportation amongst them. Rotating the fighting.

A.V.A is a classic FPS shooter game featuring various types game Modes. Depending on the battlefield, you can choose Pointman, Rifleman, and Sniper and enjoy strategic team play.

Embrace unrivaled destruction in Battlefield 4™. Revel in the glorious chaos of all-out war packed with rewarding, tactical challenges in an interactive environment.

In the direct sequel to the record-breaking Call of Duty®: Modern Warfare® II, Captain Price and Task Force 141 face off against the ultimate threat.

Experience a visceral Campaign or assemble your team in the ultimate online playground with multiple Special Ops challenges and a mix of Multiplayer maps and modes.

Flykt is a 4 player online co-op game which players will try to escape from an abandoned hospital. Players will able to choose to play as teams or as impostors to kill their friends. Flykt environment will be generated procedurally. Be silent, move stealth or get killed.

Blood Strike is a free FPS game which has more than 300 million faithful players in China. Now the battle is on, there are various modes and weapons for you to explore! Call your friends and join us,get into the battle field now!

Welcome to Call of Duty®: Warzone™, the massive free-to-play combat arena which now features the brand-new map, Urzikstan.

Escape an astonishing disaster in Ring of Elysium, a battle royale shooter developed by Aurora Studio.

An action-packed FPS where you defend your trench against waves of attacking enemies by utilizing a large selection of modern (and not so modern) military weapons, features both single-player and two player online multiplayer (peer-to-peer).

Reborn Protocol focuses in after the events of the "Rebirth Program" RB is a reimagining of the mod, "The Hidden" Heavily focusing on the Asymmetric Multiplayer aspects both sides will have to be cunning and sharp to come out on top.

Zero Caliber is the ultimate VR FPS: single player/Co-op campaign, PvP and mod support with 40+ realistic firearms & melee weapons, 100+ unlockable skins, 50+ attachments, realistic physics, progression & more! Immerse yourself in the action, customize your gear and unleash your inner hero!

Blood Rot: 1918 has players fighting against hordes of the undead in the midst of The Great War. Survive solo, or with friends in this first-person zombie shooter.

Uploaded is a fast-paced, parkour, online multiplayer, and single-player shooter created by only one developer where you play as a robot with a human mind uploaded to it.

NOW AVAILABLE! When the Earth falls to an extra-terrestrial invasion, humanity becomes an endangered species. Earthfall is a four-player cooperative shooter that challenges players to survive hordes of ruthless alien drones and their inscrutable masters.

ShotFightDisaster (SFD) is a turn-based, tactical, multiplayer FPS shooter similar to Counter Strike. Use your extra equipment to give you and your team an advantage in battle.

Multiplayer action game in the entourage of the Second World War with total destruction of the environment. Complete freedom of action. Do anything and anywhere. Build defense, demolish enemy towns, control any vehicle which you will see on your way or create.

Online FPS game, near future background, Resource Warfare between Military Forces and PMC. More than 50 kinds of original weapons with customization option. Use Peripheral objects, Tactical drones, Active objects to experience dynamic warfare.

Hello Space Survivors, this is little shooter game. Which is now most about shooting zombies but pvp will hopefully follow. Please also read the long description.

Plunge into the thrill of our dynamic shooter, intricately designed to match your gaming style and secure victories in every match. Engage in intense skirmishes where skill and strategy triumph. Each tailored experience promises a finely tuned journey, brimming with the joy of winning the Match.

Welcome to the Mini Battle Ground, here is where you can act as a soldier in front line, fight with various types of enemies, collect resources, earn advanced weapon for yourself and deploy more friendly units! And, don't forget to destroy the enemies' commander and protect ours.

Play with your team and do your best!

Play alone or team up with others and try to survive while a demon and its minions try to kill you. Your goal is simple. Escape. This might sound easy, but dealing with evil entities is a dangerous business!

Join the ever expanding experience of Hell Let Loose - a hardcore World War Two first person shooter with epic battles of 100 players with infantry, tanks, artillery, a dynamically shifting front line and a unique resource based RTS-inspired meta-game.

Pavlov vr is a multiplayer shooter in VR with heavy focus on community features. Realistic reloading features and fast paced combat as part of the core experience. Play the #1 most popular VR shooter on PC today.