Single-player games like Ilamentia
Below are 21 single-player Steam games similar to Ilamentia, 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 Ilamentia page.
Ranked picks
- 1

Antichamber
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
Antichamber is a mind-bending psychological exploration game where nothing can be taken for granted. Discover an Escher-like world where hallways wrap around upon each other, spaces reconfigure themselves, and accomplishing the impossible may just be the only way forward.
- 2

Manifold Garden
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
Rediscover gravity and explore an Escher-esque world of impossible architecture. Witness infinity in first-person and master its rules to solve physics-defying puzzles. Cultivate a garden to open new paths forward, where an eternal expanse awaits.
- 3

Door
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
You will have to face hundreds of different doors, and decide which one you should go to in order to get to the main secret. You have to open the doors in many locations of this world, each of which is dedicated to its type of doors.
- 4

Kairo
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
Enter the lost world of Kairo. Explore vast abandoned monuments. Bring strange and ancient machinery back to life. Slowly uncover the true purpose of Kairo and fulfil a great destiny.Kairo is an atmospheric 3D exploration and puzzle solving game.
- 5

Rememoried
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
Rememoried is an independent video game, a virtual place where memories change to dreams and the only possible way is forgetting, which becomes a mechanism for proceeding to the next layer of dreams. The Surrealist explorative first-person adventure game.
- 6

NaissanceE
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
NaissanceE is an obscure and magical first person exploration game, a philosophical trip and an artistic experience. The adventure takes place in a primitive mysterious structure and the game mainly consists to explore and feel the deep and strong ambiance of this atemporal world.
- 7

MIND: Path to Thalamus Enhanced Edition
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
MIND: Path to Thalamus is a First Person Puzzler that throws you into a fantastic and surreal environment. You will bend the natural elements to your will in order to progress in this emotive, mindbending tale. Now also in Virtual Reality!
- 8

INDIKA
Single-player alternative to Ilamentia — playable solo, no multiplayer required.
Play a third-person, story-driven game set in alternative Russia at the turn of the XIX century where religious visions clash with harsh reality. INDIKA tells the story of a young nun who sets off on a journey of self-discovery with the most unusual companion by her side, the devil himself.
- 9

The Witness
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
You wake up, alone, on a strange island full of puzzles that will challenge and surprise you.
- 10

Portal
Single-player alternative to Ilamentia — playable solo, no multiplayer required.
Portal™ is a new single player game from Valve. Set in the mysterious Aperture Science Laboratories, Portal has been called one of the most innovative new games on the horizon and will offer gamers hours of unique gameplay.
- 11

The Stanley Parable: Ultra Deluxe
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
The Stanley Parable: Ultra Deluxe is an expanded re-imagining of 2013's The Stanley Parable. You will play as Stanley, and you will not play as Stanley. You will make a choice, and you will become powerless. You are not here to win. The Stanley Parable is a game that plays you.
- 12

The Stanley Parable
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
The Stanley Parable is a first person exploration game. You will play as Stanley, and you will not play as Stanley. You will follow a story, you will not follow a story. You will have a choice, you will have no choice. The game will end, the game will never end.
- 13

The Beginner's Guide
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
The Beginner's Guide is a narrative video game from Davey Wreden, the creator of The Stanley Parable. It lasts about an hour and a half and has no traditional mechanics, no goals or objectives. Instead, it tells the story of a person struggling to deal with something they do not understand.
- 14

Boneraiser Minions
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
Amass an army of undead to fight endless waves of heroes intent to end your boneraising ways! In this gothic auto-battler rogue-lite Survivor-like, use the bones of slain heroes to raise your minions, collect relics and spells, and unlock meta upgrades, all to survive King Gigald's crusade!
- 15

Spirits Abyss
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
Spirits Abyss is a roguelite platformer with destructible terrain. Cast into the Abysm you must explore its diverse depths battling phantasmic meanies and plundering its useful treasures to find a way home... but does something nestle beyond the realmic veil of death?
- 16

Voids Vigil
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
Blast through robotic hordes in this arena auto-battler rogue-lite Brotato-like. Use auto-firing weapons and drones, timely dashes and special abilities to reach the Void where a final Conservator awaits convergence. Spend your Cogs wisely within the varied shops to create unique builds!
- 17

Skelly Selest
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
Skelly Selest is a score-attack hack slash dash run 'n' gun-athon. Venture into the procedurally generated perdition depths of Hell to purge the evil taint of the Deamonica Netherlords and their fiendly followers.
- 18

Straimium Immortaly
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
Straimium Immortaly is a shmup roguelike dungeoncrawler. Explore the butts-hard procedurally generated Cubicus battling beasties, looting endless item and weapon upgrades and defeating huge boss meanies in your vengeful quest to eradicate the Queeni Emperess.
- 19

Echo of the Wilds
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
Echo of the Wilds is a puzzly narrativy adventure, featuring randomised wilderness survival. Explore and survive this mysterious tale of wilds. Gather resources to build gear and sustain yourself, learning new skills, lore and the intertwining interactions between the various areas, seasons, and weather.
- 20

Xenosensory
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
Xenosensory is a short incremental game with horror themes. Use your cursor to bust Xenos and save convicts then spend your research points on skill tree upgrades, actions, gadgets, and uncover the true horrifying nature of this space station nightmare.
- 21

Deadzoned
Single-player alternative to Ilamentia — playable solo, no multiplayer required. Shares Indie with Ilamentia.
Deadzoned is a sci-fi turn-based action Roguelike. Blast your way through zones battling the beasts, bandits, and monsters that stalk the blackouts. But you'll need your wits to make best use of the gear you stumble upon to survive and save the fate of the planet!