Games like Intruder on Steam
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Serious Sam Classics: Revolution
Serious Sam is a high-adrenaline arcade-action shooter heavily focused on frantic action. In a world where cyberpunk meets fantasy-fiction and advanced technology is mixed with black magic and psycho-powers, Sam travels through four beautiful worlds, confronting countless foes on his way to Mental's base.
ARMA: Gold Edition
ARMA: Gold is pack of ARMA: Armed Assault and an expansion pack ARMA: Queen's Gambit. ARMA is a first person tactical military shooter with large elements of realism and simulation. This game features a blend of large-scale military conflict spread over large areas alongside the more closed quarters battle.
Intravenous
Teeth-clenching stealth, followed by tactical hardcore gunplay for those not looking for a quiet way in. Intravenous redefines challenging stealth-action and will keep you on the edge of your seat!
Primal Carnage: Extinction
Hunt humans, slay dinosaurs. It's chaotic prehistoric PvP, pick a side. Think fast, or you're extinct!
Finnish Cottage Simulator
Finnish Cottage Simulator is the ultimate cottage experience. Relax and enjoy the Finnish summer nature, go to the sauna, get drunk, grill food or play games with others!
STAR WARS™ Battlefront II (Classic, 2005)
Join the rise of Darth Vader’s elite 501st Legion of Stormtroopers as you fight through an all new story-based saga where every action you take impacts the battlefront and, ultimately, the fate of the Star Wars galaxy.
Arma Reforger
Experience authentic Cold War combat and join the struggle for the sprawling, mid-Atlantic island of Everon and its smaller, offshore territory, Arland – or take on the role of Game Master and create your very own scenarios for others to enjoy.
Retail Royale
A chaotic Battle Royale inside a furniture store where everything is a weapon.
War of Rights
War of Rights is a first person multiplayer game featuring massive 400 player battles with a focus on historical authenticity, teamplay and immersion. It is set during the perilous days of the American Civil War, in the Maryland Campaign of September, 1862.
IRON REBELLION
Climb inside a colossal, crushing war machine, where every switch, lever, and round of ammunition is at your command. Physically interact with every support system and navigation stick as if you were truly in the cockpit. Customize and outfit your mech to outsmart and assert your superiority.
Who's Your Daddy?!
Who's Your Daddy is a casual multiplayer game featuring a clueless father attempting to prevent his infant son from certain death. Play with up to 7 of your friends, and test your parenting skills in a competitive setup with wacky physics and over 69 potentially ominous household items.
Conflict Desert Storm™
Take charge of the most feared special operations forces in the world: the elite British SAS or the US Delta Force squads. You're the best trained, best equipped and best organised. The area that has been assigned to you is yours for the taking. Seek, locate and destroy enemy targets and personnel.
Borderlands 2
The Ultimate Vault Hunter’s Upgrade lets you get the most out of the Borderlands 2 experience.
STALCRAFT: X
STALCRAFT: X is the largest open-world online game in the Chernobyl Exclusion Zone. Explore the world full of mutants and anomalies alone or with friends — unforgettable emotions guaranteed.
Battlefield™ 1
Battlefield™ 1 takes you back to The Great War, WW1, where new technology and worldwide conflict changed the face of warfare forever.
GTFO
GTFO is a hardcore cooperative horror shooter that throws you from gripping suspense to explosive action in a heartbeat. Stealth, strategy, and teamwork are necessary to survive in your deadly, underground prison. Work together or die together.
Dominance
Dominance is a multiplayer top-down shooter, built on a no-limits attitude. Choose between a rich variety of different ability and item combinations, select one of 6 distinct characters. Battle up to 24 foes on the ever-evolving terrain — and prove your Dominance.
Serious Sam HD: The First Encounter
Serious Sam HD: The First Encounter is a visually upgraded and fully Steam supported remake version of the original high-adrenaline single-play and 16-player co-operative arcade-action FPS which was Gamespot's Game of the Year 2001 and which scored overall of 87% on Metacritic!
Cartoon Strike
"Different realities, different rules, but always fun". In the multiplayer game Cartoon Strike, each map offers a different gaming experience. Players can enjoy a few minutes of fighting in the WWII, followed by a few minutes in the present, future or even funny mode.
3D Aim Trainer
The #1 Aim Trainer and one of the most popular free pc games is now available on Steam. The best aim practice solution for FPS and TPS games, with top analytics helping you monitor your improvement for the most vital skills of aiming. Level up your aim for free.
Zula Global
Zula is an intense free-to-play FPS in which you can play cooperatively with your teammates to overthrow the enemy side. You can enjoy new content weekly and receive gifts every day. Variety of maps and weapons from the real world so you can immerse yourself 100%.