Single-player games like The Last Experiment
Below are 8 single-player Steam games similar to The Last Experiment, 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 The Last Experiment page.
Ranked picks
- 1

The Vanished Soul
Single-player alternative to The Last Experiment — playable solo, no multiplayer required. Shares Indie and Adventure with The Last Experiment.
The Vanished Soul is a solo-developed, first-person psychological horror set in 2016 in the fictional city of Novazenica. Explore a hauntingly realistic world, solve puzzles, make choices that matter, and face randomized scares in every playthrough.
- 2

STILL WATCHING: The Night Caregiver
Single-player alternative to The Last Experiment — playable solo, no multiplayer required. Shares Indie and Adventure with The Last Experiment.
Your real smartphone is your only weapon... Sync your phone with the game and pray it doesn't ring while you're hiding in the closet.
- 3

Let Me In
Single-player alternative to The Last Experiment — playable solo, no multiplayer required. Shares Indie and Adventure with The Last Experiment.
Let Me In is a psychological indie horror game with a realistic visual style and intense atmosphere. The main character finds himself in an abandoned house on one of the scariest nights of his life. Will he be able to survive? The answer remains unknown...
- 4

Where Birds Sleep
Single-player alternative to The Last Experiment — playable solo, no multiplayer required. Shares Indie and Adventure with The Last Experiment.
Join the ultimate expedition and enter Cormo's mind as he embarks on a gruelling mission to chart a mysterious island shrouded in mind-bending fog. Put your persuasion skills to the test and direct his fate with every word, but be prepared for unexpected consequences...
- 5

Red Door Ylw Door
Single-player alternative to The Last Experiment — playable solo, no multiplayer required. Shares Indie and Adventure with The Last Experiment.
Red Door Yellow Door is a first-person psychological horror game. Starting with what seems like a normal ritual but quickly revealing its sinister nature. Beware, something malevolent lurks in the shadows.
- 6

Everything Is For Humanity
Single-player alternative to The Last Experiment — playable solo, no multiplayer required. Shares Indie and Adventure with The Last Experiment.
Everything is for Humanity is a story-driven, exploration and puzzle-solving based science fiction horror game which sets in a massive science facility in 2020. You will discover tons of things and find out about the blood-chilling truths with its first-person experience.
- 7

Apartment No 129
Single-player alternative to The Last Experiment — playable solo, no multiplayer required. Shares Indie and Adventure with The Last Experiment.
Emir, who has an interest in mysterious events, steps alone into the abandoned apartment known as "Apartment No 129" to trace the trail of a paranormal event that occurred in 2009 and shook the country. However, he will find himself in an unexpected confrontation within this horror apartment.
- 8

Amanda the Adventurer 3
Single-player alternative to The Last Experiment — playable solo, no multiplayer required. Shares Indie and Adventure with The Last Experiment.
In the thrilling conclusion of the Amanda the Adventurer trilogy, follow Riley as they uncover the ultimate secrets behind Amanda, Hameln, and mysteries that have plagued Kensdale for decades.