Top similar games like 666:

Deepest Darkest is a 90s as hell and metal as hell boomer shooter. Shoot your way through an action packed single player campaign with an arsenal of weapons, power up and magic spells as you tear though an army of cultists and monsters.

BRUTAL shooter focused on action, gore, and old school death metal music. Unleash your overpowered arsenal to goreblast hordes of ferocious beasts on your way through ancient dark forest.

Take on the role of a sinner fighting for absolution against hordes of the damned. Inspired by arcade light gun shooters and boomer shooters, use your quick reflexes tools of divine condemnation to come out victorious!

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.

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

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 dark journey shaped by blood and alchemy. A FPS inspired by retro PS1 aesthetics, and a universe blending steampunk and victorian gothic. Will you uncover the fate of Cinderval?

Face off against hell forces in shooter "Grimwalker". Engage in thrilling combat with a variety of weapons and use your demon form to become even more powerful. Explore a world filled with secrets while managing your resources to survive.

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.

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.

Fight alone or with friends in a brutal horror wave-survival experience. Survive against endless waves of terrifying infected in this high-difficulty horror shooter. Play solo or with friends, unlock devastating weapons, discover secrets, and see how long you can endure the nightmare.

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.

BRUTAL First Person Shooter focused on action, gore, and exploration. Fueled by adrenaline-pumping trap-metal soundtrack.

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!

Descend into infested crypts beneath a cursed cemetery in this visceral action-horror FPS. Fight through rotting horrors with heavy gunplay, brutal dismemberment, and only a dying flashlight between you and the darkness.

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.

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).

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

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.

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

You command three operators by voice inside a besieged cathedral. You place them on their angles before the wave; you shoot during it. The deeper you go, the clearer it gets that the hostages were never the reason.

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?

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

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.

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.

Blast, slice and shred through your enemies in this hardcore FPS inspired by the icons of the '90s, powered by the legendary Quake-1 Tech. Taking place in a realm left to rot, take up arms, unearth long-forgotten secrets and hunt down the Guardians of the Old World.

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. 

Prepare for terror in this ground-breaking classic old-school FPS. Following the destruction of Time you are left to battle in this horrific hellhole of multilevel interconnected missions populated by gruesome grotesque creatures.

Nailcrown is a savage dark-fantasy boomer shooter packed with high-velocity gunplay, brutal melee action, and a dynamic gore system. Explore the dark environments and wield a deadly arsenal, while taking down a horde of accursed enemies. Fast, violent, and unapologetically old-school.

SUFFER 2 is a tough-as-nails boomer shooter with a horror punk twist - become The Spirit of Anarchy and destroy the corporate police state with righteous ninja fury!

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!

Survival & Horror: The Damned City tells the story of a cursed city where you'll have to face various enemies and bosses, each requiring a unique approach and knowledge of their weaknesses. Your father has disappeared, and you have come to this city to find him.

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

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?