Top similar games like The Citadel:

A retrowave/mecha-inspired sci-fi first-person shooter featuring fast-paced combat in old-school style open-plan levels packed with pickups, keys, and secrets.

V.R.G. is a FPS cross between a retro-style and a modern-style , Defeat enemies and get combos to improve operability, and eat scatter pieces of meat to recover.

Make mincemeat out of cults and chop heads with machetes! Old school shooter staples and gals, and a familiar difficulty level. Ye shall witness a new struggle!

GAL VS VILLAGE is an GAL like old-school FPS. You play as Kessenji “Blood-sucker” Yui, infiltrate the village, and must bring the situation under control. Move at high speed, swing your knife, blast away with the shotgun, and drive away the supernatural!!!!!!

A vampire cursed to live with head and body separated. Shoot blood as ammo, execute enemies with your flying head, and survive. Overflow your HP to unleash Blood High Mode! Dive into hardcore, over-the-top boomer shooter action soaked in blood.

Load up your Boltgun and unleash the awesome Space Marine arsenal to blast your way through an explosion of sprites, pixels and blood in a perfect blend of Warhammer 40,000, frenetic gameplay and the stylish visuals of 90’s retro shooters.

Retro FPS with dynamic fights and modern lighting. Sprite enemies once again flooded some pixel art-decorated levels. Only boomer-shooter enjoyer could deal with such kind of problem. You know the drill - gear up with a classic weapons pack and paint it red.

COVEN is a hyper-violent retro FPS where your path of vengeance will take you across time and space. Destroy your enemies and eat their flesh.

HEADCUTTER is a sci-fi spaghetti western FPS with brutal combat, destructible environments, and lots of gore. Track targets as a space bounty hunter, explore maps with multiple routes, and use the crunchy gunplay to cut their heads off so you can get your money!

Introducing the Master Levels for DOOM II. Twenty never-before-seen levels all with the same acid drenched, hell spawned horror of the originals. Each was created by independent designers and supervised by the demented minds of id Software. You might as well forget about seeing the light of day ever again.

Prodeus is a first-person shooter of old, re-imagined using modern rendering techniques and technology. Experience the quality you’d expect from a modern AAA game, designed with retro aesthetics and gameplay that invoke the tech-imposed limits of older hardware.

Slip into the Standard Issue Biosuit as Myo Hyori, a gifted Korean teenage girl who must face the perils of the future. Survive many hazards, explore a seemingly endless metropolis and beyond as the world around you implodes and history marches towards its inevitable conclusion.

The Apogee Throwback Pack is a collection of four classic Apogee Software titles all in one kick ass package. Blast your way across the galaxy as British Special Agent Blake Stone in "Aliens of Gold" and "Planet Strike", then take on an ancient evil menace as the H.U.N.T in "Rise of the Triad".

Perilous Warp is a fast-paced indie retro-shooter inspired by the classic 3D-actions. Communication with a distant space colony has been lost, and you bravely step into the teleporter with the desire for glorious adventures. But do not expect to win in a heartbeat!

A story-driven retro FPS. Fight through industrial zones, the districts of a dead city, and experimental areas to recover your memories and uncover the bloody truth of SAMOPAL Protocol.

3D Realms, creators of Duke Nukem 3D, Prey, and Max Payne, team up with Voidpoint to bring back the legendary Build Engine, famous for classic shooters like Duke Nukem 3D, Shadow Warrior, and Blood. Fast-paced FPS combat across huge, secret-packed levels. Ion Fury is the real deal!

An Anime Wave-based Arena Shooter, Kill Goblin > Collect Bounty > Buy Upgrade > Survive

Sinned Arena is a classic arena shooter inspired by timeless 90s games. You are trapped in Hell with other unfortunate souls, fighting among each other for demons twisted pleasures. Fight for your way out this dark place but beware, demons aren't there just to watch.

Borrowhelen is a 90s-style first-person shooter set in a fantastical realm like no other. As the brilliant scientist Ordin Gilbellt, you dive into battle against cultists and mythical creatures, wielding powerful and unique weapons.

Death is only the beginning. Crawl from your grave and gear up to fight your way through the ranks of a mysterious and twisted cult. You, your guns, and your dynamite will have to shoot, slide, blast, duck, dodge, and maybe throw a gib or two to survive in this old-school-inspired shooter.

UD RĒA is a retro FPS game that blends classic 90s fast-paced action with mythological elements inspired by Göbeklitepe. Unleash your rage and tear apart every creature that stands in your way.

You are part of an elite group of operatives called HUNT (High-risk United Nations Taskforce), and you must stop a maniac cult leader from killing millions of people. You are equipped with high-tech weaponry and magical instruments that defy description to invade the monastery and stop the madness.

In this cute cardboard world, something went horribly wrong... You wake up in a prison cell. A strange voice calls to you from the depths of dark corridors covered in runic symbols and blood. Reload your trusty shotgun and find out... WHY WOULD CARDBOARD... BLEED?

Old school classics with the new twist.

HROT is a single-player retro FPS set in a small socialist country neighboring Soviet Union (Czechoslovakia) after an unspecified disaster in 1986. Those times were dark and terrifying and so is the game.

Obliterate heretics in the name of the Emperor in Warhammer 40,000: Boltgun 2! Play as Ultramarine Malum Caedo or Sister of Battle Nyra Veyrath in this sequel to retro FPS Warhammer 40,000: Boltgun with MORE enemies, MORE weapons, and NEW ways to purge!

Bright Memory: Infinite is an all-new lightning-fast fusion of the FPS and action genres, created by FYQD-Studio. Combine a wide variety of skills and abilities to unleash dazzling combo attacks.

Classic First Person Shooter style game. Like the good old days. An action game focused on speed, gore, guns, and metal music. Inspired by the 90s’ classics with modern visuals and audio!

Inspired by the original DOOM, this is a grounded, no-jump boomer shooter. Play as Madeline, a thief invading a desolate, abandoned complex to claim a legendary prize. Battle through a legion of killer rogue-AI-infested toys, find secret prizes. No mercy. Pure old-school carnage.

In the year 202X, the world is "YAMI"...! To save the world, go to hell and kill all the demons. Yes, just like ordering a Frappuccino at a cool cafe!