Games like Intruder on Steam
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Open Mod 2025
Open Mod is an entirely free to play, niche, tactical, extreme hardcore first person shooter with immersive aspects that may not have been seen before.
Counter-Strike: Source
Counter-Strike: Source blends Counter-Strike's award-winning teamplay action with the advanced technology of Source™ technology.
The Ship: Murder Party
The Ship is a murder mystery multiplayer.
SWAT Commander
Take charge of a SWAT unit as an elite operator. Command a specialized AI squad or team up in co-op to seize suspects, rescue civilians, and restore order. Study the briefing, kit out your team, and execute your plan with disciplined precision.
Counter-Strike: Condition Zero
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.
False Front
Join the fun in a fast, high-energy, multiplayer first-person shooter. You'll need to be quick and agile, using trampolines and ziplines to zip around in this exciting game!
Insurgency
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.
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.
Sniper: Ghost Warrior 2
Sniper: Ghost Warrior 2 takes the bulls-eye precision of its predecessor to new and exciting heights!
Counter-Strike 2
For over two decades, Counter-Strike has offered an elite competitive experience, one shaped by millions of players from across the globe. And now the next chapter in the CS story is about to begin. This is Counter-Strike 2.
Battlefield 3™
Enjoy total freedom to fight the way you want. Explore 29 massive multiplayer maps and use loads of vehicles, weapons, and gadgets to help you turn up the heat. Every second of battle gets you closer to unlocking tons of extras and moving up in the Ranks. So get in the action.
Pixel Strike 3D
Pixel Strike 3D is a Multiplayer First-Person Shooter that features fast-paced gameplay and a wide variety of player customization. Battle friends and foes from all around the world in over 20 unique game modes, with over 70 available weapons.
Tom Clancy's Ghost Recon®
Eastern Europe, 2008. War has broken out on the borders of Russia and the fate of the world hangs in the balance. That's when the call goes out for the Ghostsan elite handful of specially trained Green Berets, armed with the latest technology and trained to use the deadliest weapons.
Sniper Ghost Warrior Contracts 2
SGW Contracts 2 is a modern warfare shooter set in the Middle East. Play as Raven, Contract Sniper Assassin, as you take out a series of targets across a dramatic single-player campaign. With extreme-range shots exceeding 1000m, gear up for the most challenging entry to the series yet.
Tom Clancy's Rainbow Six® Vegas
Tom Clancy's Rainbow Six makes its next-generation hardware debut in the most dramatic installment of the renowned first-person shooter franchise to date. Rainbow operatives take to the chaotic streets of Las Vegas as an escalating terrorist siege in 'Sin City' threatens to take world terrorism to new, uncontrollable heights.
Tom Clancy's Rainbow Six® Vegas 2
Tom Clancy's Rainbow Six® Vegas 2 - the sequel to the award-winning next-generation first-person shooter - returns to Sin City. Tom Clancy's Rainbow Six Vegas 2 is your last chance to rescue America's sexiest city from an escalating terrorist siege that will force you into heart-pounding action from beginning to end.
Battlefield™ Hardline
Strategy. Speed. Story. These are the core pillars of Battlefield™ Hardline, a cops vs. criminals experience unlike any other.
Arma 3
Experience true combat gameplay in a massive military sandbox. Deploy with a wide variety of single- and multiplayer content, a massive arsenal of modern weapons and vehicles, and limitless opportunities for content creation. Authentic, diverse, open - Arma 3 sends you to war.
Arma 2
Building on 10 years of constant engine development, ARMA II boasts the most realistic combat environment in the world. It models real world ballistics & round deflection, materials penetration, features a realtime day/night cycle and dynamic wind, weather and environmental effects.
Squad
Squad is a tactical FPS that provides authentic combat experiences through teamwork, communication, and realistic combat. It bridges the gap between arcade shooter and military realism with 100-player battles, combined-arms warfare, and base building.
Tom Clancy's Ghost Recon: Future Soldier™
In Ghost Recon Future Soldier join an elite team of highly trained, cut-throat special-ops soldiers. Armed to the teeth with unrivalled combat technology, Ghost Recon takes you to the globe’s most deadly warzones to hunt down the highest value targets.
SWAT 3: Tactical Game of the Year Edition
Uncompromised duty, honor and valor.
Operation Flashpoint: Dragon Rising
Operation Flashpoint: Dragon Rising is a game about a fictitious conflict on one of the Sakhalin islands.
Shotgun Farmers
Shotgun Farmers is the multplayer shooter where missed shots grow guns. Fire your bullets into the ground to plant your ammo. The longer a gun plant grows the more ammo you will get!
Of Guards And Thieves
Of Guards and Thieves is a multiplayer stealth game in which high-powered guards face off against fast and elusive thieves in a contest of wits. Outsmarting the enemy and shooting your way through to the goal are equally valid strategies. Simple rules, emergent gameplay and high replayability.
DEATHLOOP
DEATHLOOP is a next-gen FPS from Arkane Lyon, the award-winning studio behind Dishonored. In DEATHLOOP, two rival assassins are trapped in a mysterious timeloop on the island of Blackreef, doomed to repeat the same day for eternity.
Primal Carnage
A savage online shooter, where players do battle as man or beast in class-based deathmatches and a frantic escape mode. Unleash your inner dinosaur!
Zero Hour
Zero Hour is a tactical FPS with online team-based game play that takes place in a variety of fictional locations interpreted in Bangladesh with Real-life scale & resource management. It brings a grounded, close quarter combat experience to the game.
Havoc
Havoc is an arcade tactical first-person shooter with semi-destructible environments. It offers a variety of game modes, including Bomb Defusal, Team Deathmatch, Free for All, and Gun Game, along with extensive options to customize lobby settings to your preferences.
GROUND BRANCH
From one of the developers behind the original Rainbow Six® and Ghost Recon® games, comes a thinking-man's first-person shooter featuring in-depth character and weapon customization. Take your time. Think ahead. Get the job done.
Call of Duty®: Black Ops II
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
Ready or Not
Ready or Not is an intense, tactical, first-person shooter that depicts a modern-day world in which SWAT police units are called to defuse hostile and confronting situations.
Masked Shooters 2
Masked Shooters 2 puts you on the front line of a dangerous gunfight that can only end in victory or defeat; there will be no white flags to wave. As a covert ops soldier, you have access to advanced weapons that will blow your enemies away, if you know how to use them.
