Top similar games like 666:

You wake up as an army soldier in the middle of a mutant apocalypse, trying to figure out what the hell happened and blasting some heads on the way. Deadshot is a retro styled first person shooter inspired from classics like Half Life, Doom, Quake and many alike.

Fight your way through armies of Nazi occultists, religious zealots, and unspeakable cosmic horrors to unveil the Eldritch secrets behind the war theatre in this 2000s-era-inspired grimdark singleplayer FPS where WW2 meets Cthulhu Mythos.

A first-person survival horror game, solve puzzles and search for supplies to arm yourself with as you explore to uncover the secrets of an old mansion. Fight, run or hide from all sorts of twisted horrors.

You’re an Operator in a covert underground facility, researching advanced military and alien technology. A routine day takes a sinister turn... Fight hostile creatures, explore alien corridors, and uncover the mystery as you struggle to survive

Enter a realm of nightmares and claw and shoot your way through hordes of bloodthirsty vermin and things that are much, much worse in this retro FPS

One click, more FPS: a smart game booster with HDD-friendly preload, profile switcher (Gaming/Balanced/Power Saver), GPU preference, lightweight crosshair overlay, and Windows tuning for smoother, more consistent performance.

Son and Bone is a fast-paced first-person shooter where you take on the role of Sam Judge, a Sheriff, that after tracking down a notorious bandit who attacked a farm and kidnapped a local, has found himself on an alien world overrun by prehistoric creatures and dinosaurs.

RoundZ is a solo-developed round-based survival zombie game, with each round becoming progressively harder as the zombies get more health and in bigger waves. 

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!

Beastwatch is a retro-style horror shooter in which you play a security guard working his first night in a slaughterhouse.

A chilling survival-horror FPS set in a creepy, atmospheric world. Explore a haunted cemetery, descend into a cursed crypt, and face the horrors that lurk below. Hide, fight, survive—do you have what it takes to make it out alive?

KAUNA is a Finnish boomer shooter made with 90's retro style graphics.

An old-school shooter inspired by Wolfenstein 3D. You are one of the prisoners of an ancient prison. There is no one to help you. You only have yourself to rely on. Your shotgun. Against hordes of enemies. Animal rage and the desire to kill. Destroy Them All!

A dark fantasy shooter where the dead know no rest. Journey through nightmarish dimensions where survival hinges on magic and firepower. Every upgrade, spell, and choice leads to salvation or demise. Uncover the truth… or let it consume you.

Grab your sawed-off, cast some sigils, and face the never ending nightmare head on in Venison County. Blast your old neighbors into undead venison giblets, master weapon specific active reloads, and limitlessly combine slain cultists' sigils for their sinful buffs (if you can withstand God's wrath).

Hell Scream is a fast-paced FPS with rogue-lite elements set in a transforming Colosseum of Hell. You have multiple sinners each from a different timeline and unique abilities. Wield firearms and harness ancient supernatural as you strive for redemption against relentless demon hordes.

in REDDOOR the player must survive against endless rounds of the undead, opening and clearing doors and using weapons, perks, utilities, and Power-Ups to their advantage to survive.

New zombies need to be defeated in Square Head Zombies 2. Go to new places, find and destroy them all.

Mortal Dark is a first person action-adventure retro game where you have to do anything to survive and escape from the hungry creatures.

Square head zombies are everywhere. Grab your gun and shoot all the undead.

Arthurian Legends is a medieval first person action game set in the land of Albion during a time of myth and legend. Battle hordes of Saxons, demonic beasts, the undead and worse in thy quest to save Albion from The Masters of the Old Religion.

The Hellchemist is an intense pve arena shooter where you will fight waves of monsters while random events will alter the way you have to play the game and makes every run unique. The game is heavily inspired by Doom and Quake. Bunny hops, shooting and a whole lot of explosions!

After Dark is a first-person endless wave zombie shooter set across multiple locations. Survive as long as you can against relentless hordes of the dead in a fight that only ends when you do.

A catastrophe is about to happen and you have only a limited time to prevent it. Use your time stopping powers to make the most out of what little time you have!

Kill aliens in creative ways in this wacky retro FPS featuring non linear, highly interactive maps. Zombaliens blends retro FPS with immersive sim, letting you use anything in your environment against your enemies, while retaining the speed and simplicity of a retro FPS.

Mortanis Prisoners Prologue is a first part of the full game: Mortanis Prisoners.

Mortanis Prisoners - A survival horror game set in a Third Reich concentration camp where the camp's leadership, upon discovering a planned rebellion, orders the execution of all accomplices. Main protagonist encounter an even more terrifying fate. Will they be able to escape the nightmare?

World War II rages and nations fall. The Nazis are twisting science and the occult into an army capable of annihilating the Allies once and for all. As US Army Ranger William “B.J.” Blazkowicz, pierce the black heart of the Third Reich and stop them...or die trying.

The game is a simple first-person shooter in which you can sprint, reload and heal. You can play with an XBOX controller or with a mouse and keyboard. The usual keyboard layouts are used, such as WASD and Shift. You only have a certain number of shots and a life bar.

One Last Toast is a single player retro-inspired action horror game set in a Venetian villa. Explore the intricate interiors, solve puzzles and battle relentless zombie hordes to reach the heart of the curse trapping you in this haunted estate.

Play as a survivor of the aftermath of a train wreck during the Western Expansion era. Traverse the haunting railway tracks of a rural settlement cursed by supernatural forces unleashed after displacing Native inhabitants.

Zombiemachia offers a mature and intense experience for fans of carnage. Face endless waves of zombies with weapons, traps, and dismemberment, all in a realistic environment.

A strange fog rise up. You grabbed your shotgun when you heard a voice outside. Wtf Zombies. Try to stay alive for 5 minutes and kill them all to win and unlock next difficulty level.

Destroy enemies and bosses using a variety of weapons. Visit different times and places with unique enemies. Inspired by classic games from the of 90s genre.