Games like Intruder on Steam
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SCP: Nine-Tailed Fox
You are a leader of Foxtrot Unit 1 "Nine-Tailed Fox", a highly trained force tasked with re-containing a multitude of terrifying anomalous monsters that have broken loose inside of a top-secret research facility.
Call of Duty: World at War
Call of Duty is back, redefining war like you've never experienced before. Building on the Call of Duty 4®: Modern Warfare engine, Call of Duty: World at War immerses players into the most gritty and chaotic WWII combat ever experienced.
Redmatch 2
A free fast-paced online multiplayer FPS with grapple hooks where you upgrade your stats with kills!
BattleRush
Free-to-play multiplayer action game in the entourage of the Second World War with total destructibility of the environment. Enjoy full freedom, build a defense, create your army, crush the enemy.
Penguins Arena: Sedna's World
Penguins Arena is a thrilling and innovative First Penguin Shooter with quick, hectic rounds and where the magic of reincarnation, combined with the supernatural ability to return to the game as a ghost, ensures that your character has every chance to change your tribe's fate, even in the afterlife.
Demolish & Build 2018
Your company is going global. Use big machines to demolish huge buildings or go close and personal and use your hammer. Buy land properties, upgrade your machines and hire workers in different parts of the world.
Quake
Developed by the award-winning id Software, Quake® is the ground-breaking, original dark fantasy first-person shooter that inspires today’s retro-style FPS games. With Quake (Enhanced), experience the authentic, updated, and visually enhanced version of the original.
Ravenfield
Fight upon the Ravenfield together with your Blue allies! Take down those pesky Reds using helicopters, tanks, guns, and active ragdoll physics!
Freeman: Guerrilla Warfare
In the anarchic world of Freeman: Guerrilla Warfare, only the mightiest warlord rules. Start with a pistol and a few militias, you will set yourself on a wild and ambitious journey towards world domination. Enjoy the immersive combination of intense FPS and sandbox strategy.
Sniper Elite 5
The award-winning series returns as Karl Fairburne fights to uncover Project Kraken in 1944 France. The genre-defining authentic sniping, with enhanced kill cam, has never looked or felt better as you fight across immersive maps to stop the Nazi war machine in its tracks.
Sniper Elite 4
Discover unrivalled sniping freedom in the largest and most advanced World War 2 shooter ever built. Experience tactical third-person combat, gameplay choice and epic longshots across gigantic levels as you liberate wartime Italy from the grip of Fascism.
Brothers in Arms: Hell's Highway™
Brothers in Arms Hell's Highway brings the critically acclaimed squad-based WWII shooter into the next generation of gaming with amazing graphics and sound, new cutting-edge gameplay features and a totally redesigned online component.
Chivalry: Medieval Warfare
Besiege castles and raid villages in Chivalry: Medieval Warfare, a fast-paced medieval first person slasher with a focus on multiplayer battles
Call to Arms
Call to Arms offers an innovative mix of real-time strategy and 3rd, as well as 1st person controls. Set in the time of modern warfare, the game offers realistically modeled vehicles and heavy weaponry. Command your troops to victory or fight by yourself in the 3rd or 1st person action mode.
Puppet Master: The Game
This free-to-play online multiplayer game celebrates the series' 30-year legacy. Revisit iconic locations, select from a large roster of playable characters from the movies, and play a variety of online multiplayer game modes, each inspired by the Puppet’s many adventures.
Gloomwood
Trapped in a dark, Victorian city consumed by an ancient curse, you must plan your survival and daring escape using nothing but stealth, an arsenal of eccentric weapons, and your wit in this haunting adventure inspired by the immersive sims and survival horror greats of the late 90s and early 2000s.
Serious Sam 2
Serious Sam 2 is a shot of adrenaline to the hearts of first-person shooter fans across the world. This is serious!
Quake Live
Experience the most exciting and fast-paced FPS gameplay while competing with players from around the world in over 100 arenas, a dozen game modes, and with persistent career stats tracking, in this online features-focused successor to Quake III Arena.
The Bonerooms
The Bonerooms is a goofy horror-themed multiplayer game about surviving in a living maze. What will be your downfall? The spooky inhabitants of the maze, or your fellow players?