Top similar games like Happy Door:

Descend the dangerous depths of Mindaro, a 1-6 player co-op action-horror game. Navigate caves, biomes, and industrial ruins while scavenging for survival and uncovering hidden secrets.

Put on your thermos bags and head outside with your friends. You will have to deliver food to the aliens and make sure that the last company on Earth does not close down.

An online co-op horror game where you and your crew hunt monsters inside a massive WALKER. Use your environment, items, or anything at your disposal to protect your WALKER.

A 4 player co-op horror where you answer distress calls and board spaceships in search of survivors.

A 1-4 player co-op Christmas horror game. You have 3 days to deliver the presents and save Christmas, or die trying.

Online co-op horror game where up to 6 wizard minions go into an archmage’s tower. Use an assortment of spells to vandalize, break and steal - but beware the horrifying magical creatures that roam the halls.

Brutal Cube is a CO-OP multiplayer action game where you explore dangerous and diverse regions. Gather resources, fight enemies, and work with your team—or act selfishly and turn against them.

A co-op or solo survival-horror scavenger game where you explore labyrinthine Backrooms levels, dodge stalking entities, haul scrap to hit corporate quotas, and invest your pay in upgrades to dive even deeper

In this 4-player online co-op horror game, you embark on an adventure by summoning a mysterious train. You must find and defuse bombs in an 8-carriage train. However, beware, there's a blind conductor and dangerous creatures chasing you. Race against time, find the bombs, and survive!

A co-op horror about scavenging at abandoned moons to sell scrap to the Company.

Play solo or online co-op with up to 4 players. Descend into monster-infested caves with your crew, gathering resources while evading terrifying creatures. Gear up between expeditions as you drill deeper into increasingly dangerous depths.

A co-op survival horror for 1–4 players — deliver cargo, stay alive, and trust no one for too long.

A 1-8 player co-op sci-fi looter horror game that takes place on a mysterious asteroid belt where players must complete contracts by traveling to exotic planets to kill creatures, find loot, and/or farm planetary materials that they must return to an ominous figure named Sketchy.

They came; they died. Now it's your job to clean up their mess.

Wander haunted halls as an office temp and collect magical cards with supernatural abilities to fight demons and and explore the underworld in this horror, deckbuilding, roguelike game.

Nemiza's Verdict is a cooperative roguelite dungeon crawler where your soul takes over various monstrosities. Hunt down Nemiza and challenge their verdict in the twisted labyrinth of Lovence by evolving your monstrous abilities and remember skills from your past life.

OopsFixers Company is a cooperative action game for up to 4 players where you work in a team to fix extreme situations that other companies avoid. Control unique characters. Collaborate with your teammates. Improve your team to be ready for the impossible.

A co-op horror game for up to 4 players where you explore abandoned facilities. Your mind can be plugged into random electric devices. Can you survive as a fridge? A vacuum cleaner? Scavenge valuable hardware and escape the terror.

Explore forgotten dimensions, find forbidden objects, and reveal hidden secrets. Beware - time is your enemy, and something is watching you. A mix of roguelite, horror, stealth, pressure, and secrets best left alone.

Explore new planets and civilizations. Turn in precious artifacts to the management company and get rich financially!

A late-night snack turns into a nightmare. GROSSERIES is an online co-op survival horror game set in a weird grocery. Investigate with up to 8 friends to explore, survive, and defend yourself from monstrosities guarding this deformed dimension. Will you let hunger consume you before the monsters do?

CoopRooms is a co-op survival horror game for up to 5 players, set in the endless Backrooms. Take photos and videos to progress—and maybe survive. Just don’t scream... the Entities are listening.

Wander haunted halls as an office temp and collect magical cards with supernatural abilities to fight demons and and explore the underworld in this horror, deckbuilding, roguelike game.

Witch girl got killed. is a first person fantasy horror action game inspired by Japanese anime. Become a witch girl in training and infiltrate the labyrinth that has appeared in town in order to destroy the structure’s brain.

Venture forth as part of a specialized team of fellow players tasked with retrieving classified materials, evading the black goo virus, and the nightmarish entities it has spawned. With time running out before the US government initiates a devastating nuclear strike to contain the spreading menace.

Loot dungeons with your berserker viking crew in ancient America. Bring valuable treasure back from the depths, lose limbs in the process, build your ship, dream of moon.

A co-op sci-fi looting game where you and your animal crew raid derelict space wrecks, dodge traps, collect valuable junk, and survive with limited oxygen and questionable teamwork.

Solo or up to 8 players. Get rid of your employer's failed experiments in abandoned underwater labs. Navigate your submarine, avoid abyssal terrors, and remove all corpses.

You are some small-time journalists, exploited by your boss. When an abandoned Cold War-era shelter is discovered, your boss sends you there to do the story of a lifetime. Only you two will know what awaits you in there...

N.O.X. is a co-op horror game where up to four players take on the roles of paranormal investigators. Players must find clues, identify the type of spirit, and banish it using their tools, either alone or together with their crew.

Scavenge through abandoned locations with your friends, buy tools, and venture further into eerie corridors and rooms filled with monsters and ghosts, then haul the loot back to the truck before dawn.

A cooperative horror game about working inside the corporation "The Backrooms". Fulfill contracts and also earn extra money by selling stuff.

Victor’s Test: a trial of supernatural resistance. Guard the museum at night, spot artifact anomalies, and adapt as doors shift—triggering or erasing them. Welcome to Victor’s Test Night: Rêves.

Run, warp, and fight (but mostly run) your way through the Paris catacombs with up to 4 players to loot the most valuable treasures left behind. But beware - there's a reason the catacombs have been closed to the public for many years.

Explore haunted zones with friends in this co-op horror! Grab cursed decor, sell it fast, and escape before the house eats someone (again).