Single-player games like Moons of Madness
Below are 18 single-player Steam games similar to Moons of Madness, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Moons of Madness page.
Ranked picks
- 1
SOMA
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
From the creators of Amnesia: The Dark Descent comes SOMA, a sci-fi horror game set below the waves of the Atlantic ocean. Struggle to survive a hostile world that will make you question your very existence.
- 2
Observation
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
Observation is a sci-fi thriller uncovering what happened to Dr. Emma Fisher, and the crew of her mission, through the lens of the station’s artificial intelligence S.A.M.
- 3
Transient: Extended Edition
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
H.P. Lovecraft meets Cyberpunk. Delve deep into a dystopian world and investigate what is happening to you and your friends in a domed city. Solve puzzles, hack systems and plug in to explore other dimensions. Discover a truth that might tear apart your sanity and question your very existence.
- 4
The Alien Cube
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
A cursed legacy awakens something ancient, revealing a terrifying reality never meant for human eyes. Follow your missing uncle’s trail, uncover forbidden secrets, and face a Lovecraftian cosmic horror in this first‑person adventure.
- 5
Conarium
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
Conarium is a chilling Lovecraftian game, which follows a gripping story involving four scientists and their endeavor to challenge what we normally consider to be the ‘absolute’ limits of nature. Inspired by H.P. Lovecraft’s novella "At the Mountains of Madness", but largely set after the original story.
- 6
The Land of Pain
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
Something strange appears in the woods. Lost in a dark and unknown place, survive an unrelenting enemy, solve puzzles, and uncover the ancient mystery that’s befallen this land in this Lovecraftian Cosmic Horror adventure.
- 7
Narcosis
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
Survival, horror at the sunless depths of the Pacific Ocean: Stranded on the seafloor with low light and few tools, an industrial diver takes desperate steps to surface before his oxygen — and sanity — give out.
- 8
ROUTINE
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
ROUTINE is a First Person Sci-Fi Horror set on an abandoned lunar base designed around an 80s vision of the future. Explore and investigate your surroundings as you survive against unknown threats.
- 9
Outlast
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
Hell is an experiment you can't survive in Outlast, a first-person survival horror game developed by veterans of some of the biggest game franchises in history. As investigative journalist Miles Upshur, explore Mount Massive Asylum and try to survive long enough to discover its terrible secret... if you dare.
- 10
Event Horizon
Single-player alternative to Moons of Madness — playable solo, no multiplayer required.
Take command of a space fleet and start your galaxy exploration mission.
- 11
~Be a maid in the Demon World~ The Secret Café of the Demon Angel Hero.
Single-player alternative to Moons of Madness — playable solo, no multiplayer required.
The protagonist who Reincarnated to the Demon World became a black mascot, in order to restore his original appearance. Use the knowledge of the "different world" to transform the little devil's tavern into a maid cafe, and aim for the first maid cafe in the demon world!
- 12
Park The Car
Single-player alternative to Moons of Madness — playable solo, no multiplayer required.
Park the car is a racing game where you need to park your cars in a safe location!
- 13
Alien
Single-player alternative to Moons of Madness — playable solo, no multiplayer required.
Alien is a visual novel exclusively for adults! This story is about a guy who has been dreaming of having sex with an alien woman for a very long time. At some point, this dream comes true and the guy finally fucked an alien woman!
- 14
Pinchcliffe Grand Prix
Single-player alternative to Moons of Madness — playable solo, no multiplayer required.
Immerse yourself in the world of Flåklypa in this game for the whole family. Play nine mini games, enjoy the classic story and take it to the tracks for high-octane racing, alone or with a friend in split-screen. But watch out, your competitors will use dirty tricks to win – and so can you!
- 15
Somber Echoes
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
Armed with God-given powers, the revived tribune Adrestia is given a second chance to save the universe from her maniacal twin sister. Find secrets, acquire upgrades, and dominate mighty foes through sheer combat prowess as you explore and conquer the horrors of the forsaken vessel Atromitos.
- 16
Shiftlings
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
The galaxy's biggest no-brainer!Control two adorably dim-witted alien space janitors on their quirky quest to repair the galaxy!
- 17
Captain Sabertooth and the Magic Diamond
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
Embark on an epic quest for treasure in Captain Sabertooth and the Magic Diamond, a pirate platform-adventure game for the whole family!
- 18
Pinchcliffe Grand Prix Anniversary Edition
Single-player alternative to Moons of Madness — playable solo, no multiplayer required. Shares Adventure with Moons of Madness.
Experience the magic of Pinchcliffe Grand Prix in this anniversary edition, now with even more exciting features and activities! The expanded version includes 8 extra mini-games from the 2000 edition, which, together with the classic gameplay, provide a complete and memorable gaming experience!