Games like The Citadel on Steam
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Red Eclipse
Building on over 15 years of gameplay design, Red Eclipse continues to focus on fast paced, agile, easily accessible first person shooter gameplay. For creators, the full power of the Tesseract engine is at your fingertips in the included realtime multiplayer editor.
Shadow Warrior Classic (1997)
Strap on your combat sandals...Lo Wang is coming to the Land of the Rising Sun to turn out the lights. Experience total blood immersion. If you can't touch, kill or drive something...then blow it away! Whether you're wielding shurikens, an Uzi, or a freshly plundered Guardian head...you've got your work cut out for you.
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.
Serious Sam 4
Serious Sam 4 reignites the classic FPS series in a high-powered prequel loaded with an explosive arsenal, intergalactic carnage, and perfectly timed one-liners.
360 No Scope Arena
360 No Scope Arena is an online multiplayer shooter with a twist: you have to spin around before you can shoot your gun. Every kill is a "360 No Scope" in this arena. Every shot is a trick shot. This game rewards pure aiming skill above all else.
DOOM
Now includes all three premium DLC packs (Unto the Evil, Hell Followed, and Bloodfall), maps, modes, and weapons, as well as all feature updates including Arcade Mode, Photo Mode, and the latest Update 6.66, which brings further multiplayer improvements as well as revamps multiplayer progression.
Shadow Warrior
Shadow Warrior is a bold reimagining of the classic 3D Realms’ shooter from independent developer Flying Wild Hog (Hard Reset) starring the legendary and quick-witted warrior Lo Wang.
DOOM Eternal
Hell’s armies have invaded Earth. Become the Slayer in an epic single-player campaign to conquer demons across dimensions and stop the final destruction of humanity. The only thing they fear... is you.
Project Warlock
Project Warlock is a first-person shooter that fans of Doom, Hexen, and Wolfenstein cannot miss. It serves you an exploding cocktail of bullets, spells, and monsters. Battle through 60 levels of non-stop action, packed with bloodthirsty enemies and challenging bosses.
Kingpin — Life of Crime
Kingpin is a tale of revenge. Take control of a street gang and order your recruits to attack, defend or even do a little safe-cracking to pick up some needed cash. Use that cash to buy nastier weapons and take down your punk enemies in this intense first-person shooter. Being the Kingpin is half attitude and all action.
Wrought Flesh
Rip out organs and equip them in your own body. Fight biopunk monsters and drugged-up space bandits. You are a Gajeshian Cultist: A near-mythological being built from the bodies of long-dead saints.
RoboCop: Rogue City
Become the legendary part man, part machine, all cop hero and deliver justice in Old Detroit.
Super Cyborg
Super Cyborg is an old school non-stop hardcore run'n'gun action game! You are an elite battle cyborg who is sent in to investigate a series of anomalies on a mysterious island. The merciless alien known as the 'Xirxul life form' has been awakened by unwitting scientists and now: all humanity is in danger!
Quake 4
As part of the elite Rhino Squad, you must spearhead Earth’s military invasion of a hostile alien homeworld. But, in this desperate war for humanity’s survival against an unrelenting enemy, you may discover that the only way to defeat them...is to become one of them.
NecroVisioN: Lost Company
NecroVisioN: Lost Company is the prequel to original horror FPS shooter, taking place before the NecroVisioN story begins. It contains a bunch of unique levels, characters, weapons and gameplay elements as well as new main hero that presents the original game story from opposite perspective.
Blood™ Fresh Supply
Battle an army of sycophantic cultists, zombies, gargoyles, hellhounds, and an insatiable host of horrors in your quest to defeat the evil Tchernobog. Squirm through 42 loathesome levels filled with more atmosphere than a Lovecraftian mausoleum.
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!
Serious Sam Classic: The First Encounter
Serious Sam is a high-adrenaline single-play and 16-player co-operative arcade-action FPS and Gamespot's Game of the Year 2001!
Quake II RTX
Quake II RTX is a cutting-edge, ray-traced reimagining of id software’s old school classic, by NVIDIA’s Lightspeed Studios. Global lighting effects, including realistic reflections, refraction, shadows, ambient occlusion and global illumination are a result of the path-traced simulation of light.
Supplice
Supplice is a stylish throwback shooter inspired by the mid-90s FPS glory days and the legendary Doom modding community. Mixing the retro stylings of 90s era shooters with colorful graphics and frantic gameplay, it creates an experience that's ever so familiar but also exciting and fresh.
Forgive Me Father
Forgive Me Father is a dark retro horror FPS set in a comic book style world inspired by the novels of H.P. Lovecraft. As the only one left with full senses, you begin a journey in search of answers and relief. How long can you last?