Single-player games like Door2:Key
Below are 15 single-player Steam games similar to Door2:Key, 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 Door2:Key page.
Ranked picks
- 1
Door
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie and Adventure with Door2:Key.
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.
- 2
The Witness
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie and Adventure with Door2:Key.
You wake up, alone, on a strange island full of puzzles that will challenge and surprise you.
- 3
Kairo
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie and Adventure with Door2:Key.
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.
- 4
Obduction
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie and Adventure with Door2:Key.
A new sci-fi adventure from Cyan, the creators of Myst. Abducted far across the universe, you find yourself on a broken alien landscape with odd pieces of Earth. Explore, uncover, solve, and find a way to make it home.
- 5
Quern - Undying Thoughts
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Adventure with Door2:Key.
Discover the truth about Quern’s past, unfold the mysteries of its present, and be the explorer who shapes its future. Quern introduces reusable puzzle mechanics to the classic genre, making the player think about the game as a whole, and not just as a series of individual challenges.
- 6
Gordian Rooms 2: A curious island
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie and Adventure with Door2:Key.
Your adventure continues in Gordian Rooms 2... The escape island game where you venture further into the mysteries of the Gordian Society! Challenge your wits and conquer every puzzle on the Isle of Lye!
- 7
The Guest
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie and Adventure with Door2:Key.
'The Guest' is a gloomy adventure full of enigmas where the exploration of your surroundings comes to prominence; puzzles, secrets and riddles will help you discover who has locked you in this somber hotel room and most importantly, why.
- 8
Homesick
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie and Adventure with Door2:Key.
Explore an abandoned building, encountering puzzles and clues to discover what happened, as you try to escape in both your nightmares and the waking world. Be immersed in the hauntingly beautiful 3D atmosphere in this puzzle exploration mystery game.
- 9
Calculate It
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie with Door2:Key.
A roguelike where you build your own calculator. Buy unusual buttons, combine them with passive upgrades, and reach target numbers while saving turns and charges. Defeat bosses that change the rules and unlock new possibilities for future runs.
- 10
Pandora`s room
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie and Adventure with Door2:Key.
What would happen if you were in the room, the only thing that will be inside is the mysterious red button? Nothing happened, as long as you do not press it. Your choice determines everything here, because the room is full of secrets, and each key has consequences that will determine the outcome of the game is yours.
- 11
Power of The Void
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie and Adventure with Door2:Key.
Welcome to Hell! Can you help a little demon escape from hell and go to heaven? He does not want to torture sinners but wants to help lost souls. To do this, he will have to use the power of void and go through hell, purgatory, and paradise, to gain freedom. However, the devil does not intend to give up so simply.
- 12
Golden Key
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie with Door2:Key.
Do you think that officials are greedy and corrupt fools? Congratulations, now you are one of them. You are an official whose daughter was suddenly and deadly sick and needs money for treatment. Will you save your daughter and become a hero for her, or will you be a hero for your people?
- 13
Kalidazkoph
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie with Door2:Key.
Cleaning up in your attic you find strange VHS tapes on which are recorded some experiments. Understand the secrets surrounding these tapes and understand the purpose of the dimension machine.
- 14
Pillow Simulator
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie and Adventure with Door2:Key.
Bored of sheep, flower and stone simulators? Do you want something really different? Meet the pillow simulator!
- 15
Dungen
Single-player alternative to Door2:Key — playable solo, no multiplayer required. Shares Indie with Door2:Key.
A fun roguelike with cards, which differs from the rest in one small detail: for each card you pay with your health. Who will kill you faster, the enemy or yourself?