Games like Deep Dark Space

Hidden Deep is a 2D sci-fi thriller game set in a sub oceanic mining and research facility, where you lead a team to discover what happened to the previous researchers who went missing. Utilize specialized equipment, give orders to your team, and defend against horrific alien life forms and other unknown dangers. The game features multiple game modes, including a single-player option.

"MetaPhysical" is a horror action game that offers both single-player and multiplayer modes, including co-op and PvP. In this game, players can hunt down supernatural creatures or become one themselves. With a variety of items and missions, players must equip themselves and search for clues before confronting their otherworldly enemies. However, beware of bugs that may hinder gameplay. The game's description warns players to be vigilant of the hidden dangers in the metaphysical realm above our own physical world.

In Dark Matter, you play as a space engineer named Enzo, who wakes up on a derelict spaceship with no memory of how he got there. As you explore the ship, you'll encounter dangerous alien creatures, avoid environmental hazards, and uncover the crew's dark secrets. With a focus on survival and exploration, Dark Matter features a variety of weapons and upgrades to help you navigate through the darkness.

"Hellpoint" is a horror RPG set on a derelict space colony with dark sci-fi elements and a disturbing atmosphere, featuring real-time orbiting around a black hole. Play as a Spawn of the Authority, uncovering the mystery of a quantic cataclysm in single-player, local/online co-op, or PvP. The game offers rich RPG mechanics, character builds, and dense interstellar intrigue, but beware of bugs and grinding.

White Noise Online is a cooperative horror game where up to 4 players explore haunted areas to uncover clues, while avoiding being caught by a supernatural creature. The game features over 15 playable characters, each with unique perks and skills, and 6 different scenarios. It offers a replay screen to review the team's path and choices, encouraging communication and teamwork for survival.

"Grav" is a Science Fiction Shooter game that combines frenzied combat with gorgeous visuals and procedurally generated planets for a unique and immersive experience. Play in single-player, multi-player, or co-op modes, with plenty of humor, grinding, and a beautiful soundtrack. However, expect some bugs in this early access game.

Barotrauma is a 2D co-op submarine simulator set in a harsh underwater environment on Jupiter's moon, Europa. Players must work together to explore and survive, with the option to sabotage and let the ship go down in fire and flood. The game features teamwork, physics-based mechanics, alien sea monsters, and multiple factions to interact with.

"Alien Breed 2: Assault" is a sci-fi survival horror game set in a space vessel overrun by alien invaders. As a space marine, players must navigate through the ship, battle aliens, and complete objectives to progress. The game features improved graphics and new gameplay elements compared to its predecessor, including a new melee system and more destructible environments. Co-op play is also available, allowing players to team up and fight the alien threat together.

In "Murky Divers," team up with up to 4 players to search the ocean floor for corpses and evidence of failed experiments in abandoned labs. Use a caddie to extract bodies and a shredder to destroy proof, while avoiding dangerous sea creatures and oxygen shortages. Coordinate with your team to pilot the submarine and purchase upgrades with your earned credits. Work together to complete your mission and survive the murky depths.

Interstellar Marines is a tactical sci-fi First Person Simulator, inspired by movies like Aliens and games like Half-Life. It offers singleplayer and co-op/PvP gameplay, with dynamic environments and non-scripted AI. The game aims to evolve the FPS genre with its blend of sci-fi, role-playing, and military realism.