Top similar games like Flat Mars:

A massive demonic invasion has overwhelmed the Union Aerospace Corporation's (UAC) Mars Research Facility, leaving only chaos and horror in its wake. As one of only a few survivors, you must fight your way to hell and back against a horde of evil monsters.

ENTER HELL and experience blood and torment the way God intended. Use shotguns, rocket launchers, and more to spread the joy of suffering to your friends and loved ones.

Do Not Destroy is a single-player first-person action game set in randomly generated, fully destructible cities. As the “Concerned Citizen,” you’ll fight against Pluto’s corporate invaders, scavenging their alien technology as you tear through your city and take it back.

90's-style first-person shooter set in a large alien base filled with angry monsters.

GoreBox is a chaotic physics-driven sandbox where creativity meets destruction. Use the Reality Crusher to spawn, manipulate, and obliterate anything. Customize, battle with friends, roleplay, or face devious creatures. In this world, your imagination rules—and chaos is your playground!

A demonic invasion has overwhelmed the Union Aerospace Corporation's Mars research facility. As one of only a few survivors, you must fight your way to hell and back against a horde of demons in this award-winning horror/action FPS and reimagining of the original DOOM.

Swing, dash, and leap through a relentless storm of bullets and laser beams. Armed with shotguns and explosive firepower, eliminate foes in a thrilling ballet of destruction. Master the power of the grappling hook for unstoppable, spider-like agility. Can you dodge, weave, and strike with precision?

Sinned is a fast-paced retro FPS game situated within the darkest depths of hell where you will fight demonic legions and Pandemonius, Lord of Hell himself!

Dragged into a dark conspiracy, explore and survive your way through the beginning of the end for the nation of Australia. Use your wits and instinct to stay alive in this 2000s-style first person liminal exploratory horror shooter set down under during the 1990s.

RAGDORE is a physics-driven sandbox where limbs fly, bones snap, and movement changes with every injury. Experiment with traps, crushers, trampolines, and more in colorful maps designed for creative destruction and dynamic ragdoll mayhem.

ZOMBIECAM is a full-throttle bodycam style first person shooter arena zombie game with relentless gameplay and action. Also includes nightvision mode and Chamber of Pain.

Dreadfire is a thrilling ultraviolent FPS game. Shred your enemies with a large destructive arsenal. Destroy them until none remain. They won't stop until you're dead.

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

Porcupine's Fate is an atmospheric first-person sci-fi horror shooter with puzzles, mysteries, and melancholic undertones. This is Chapter 1 in a six-chapter game.

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!

Become the unstoppable, destructive force at the center of Hell's eternal war. Fight in massive battles against thousands of demons that stretch to the horizon. Master brutal, high-speed combat and seamlessly command your own legions to carve a bloody path to the throne of Hell.

Explore the gloomy rooms of a sci-fi base as a doomed marine, the sole survivor of the portal experiment. Save humanity as you did in the 90s with your trusty shotgun, make your way through ominous corridors inhabited by the shadows of sinners and evil spirits.

Papa Needs a Headshot is a brutal western-steampunk FPS soaked in kin blood. Rip through flesh and bend the battlefield with your cursed metal arm. Use every bullet wisely to slaughter freaks and abominations on your warpath. Keep enduring only to put a bullet in the skull of the man who made you.

UNLEASH HELL is a brutally hard wave based Arena FPS with fast paced action, plenty of blood-n-guns and more demons than you can shake a shotgun at. Think you have what it takes?

Sprawl Zero is a fast-paced shooter inspired by the Golden Age of 2000s FPS. Survive a brutal cyberpunk city collapsing under military rule and cult fanaticism. Use your Gravity-Gloves, augments, and an arsenal of over 40 weapons to crush those who stand in your way.

Escape from the depths of a top-secret research facility as you slash through creatures like giant mutant aliens, robot demons, and countless other experiments gone wrong. Inspired by classic games like Half-Life, Quake, and Doom, The Enemy Below raises the bar of what a modern retro-FPS can be.

"Boiling Steel" - is a sci-fi story-based FPS VR shooter. You are one of many who set off in search of a better life in the distant bastion of scientific progress. Immerse yourself in the thick of events and witness the inexplicable global cataclysm.

The space station has undergone an unknown contamination from space, the previously unknown X virus mutates, almost the entire station crew is infected, you need to stop the army of mutants before they break through to Earth and doomsday began!

Blood, Fuel, Ammo & Speed is a fast-paced roguelite FPS action game. BFAS is focused on highly brutal, stylish, and smooth gameplay. Rip the Demons apart with your various satisfying weapons and sleek movement patterns. Power up your Operator with numerous stat upgrades and items.

Havoc in a wacky apocalypse. Dual-wield gunblades while riding a unicorn, stop to pet your dragon then ride off on your spaceboat. Investigate the fall of the once-flourishing metaverse in a satisfying mayhem on a rainbow made of ragdolls where zombies fly in slow motion and chickens lay airstrikes!