Games like The Sleep Experiment

"God's Basement" is a first-person shooter game where players navigate through a procedurally generated basement filled with monsters. The objective is to survive and defeat the final boss, Erebus, to escape. With each playthrough, the layout and enemies change, providing a unique experience every time.

"Subway Midnight" is a surreal, atmospheric first-person exploration game. Players navigate a mysterious and constantly shifting subway system while uncovering cryptic messages and avoiding otherworldly creatures. The game features a haunting soundtrack and a striking, monochromatic art style.

Amenti is a single-player horror adventure that plunges you into the eerie, underground tomb of Rudamon to uncover the truth about ancient Egypt’s link to aliens. With a dense atmosphere, masterful visuals, and an intriguing plot, you explore dark corridors as a historian and photographer, though gameplay can be hindered by bugs.

"REVEIL: Funhouse Edition is a single-player Horror Action game, renowned for its phenomenal story, compelling gameplay, ingenious visuals, and sensational soundtrack. Wake up as protagonist Walter Thompson, disoriented and with a headache, in a surreal world filled with versatile puzzles, unanswered questions, and a disturbing psyche. The edition includes an original soundtrack, digital artbook, black and white filter, audio plays, and developer commentary."

"Stairs" is a single-player Horror Action game with a good plot and delightful graphics, but beware of the bugs. Inspired by real-life events, the game follows journalist Christopher Adams as he investigates the mysterious disappearances of three people through a first-person atmospheric psychological horror experience. Using a camera and journal, players unravel grizzly stories of Valerie Berkley, James Reed, and Jean Jowars Remens, encountering supernatural elements along the way. The game successfully creates a perfect atmosphere of tension and fear.

"Agony is a single-player horror shooter game with a good plot, impressive graphics, and a semi-open world. As a tormented soul in Hell, you'll need to possess demons and interact with other souls to survive and escape. Despite some bugs and grinding, Agony offers a unique and atmospheric experience, with multiple paths, endings, and secrets for players to uncover."

"Visage is a nerve-wracking first-person horror simulation, centering around exploration of a vast, ever-changing house with a dark past. Its intricate story unfolds through surreal visuals and atmospheric details, coupled with exceptional graphics, soundtrack, and an ingenious sense of place. Be prepared for a challenging, highly emotional experience that may contain bugs and requires patience."

In "Who's at the Door?", you navigate the fragile line between hallucination and reality as a psychiatric patient struggling with persistent visions. Your task is to follow a daily routine of checking for visitors and taking medication to improve your condition over eight days. Multiple endings and hidden doll pieces encourage replay to uncover the full truth behind your experience.

"Blameless" is a free 3D adventure game focused on puzzle-solving and story, taking place in an unfinished house where you must escape a mysterious pursuer. The game features realistic puzzle mechanics, investigative gameplay, and a mysterious atmosphere with alternative solutions and story progression through exploration. The game is a short, intense experience with a tension-filled element of surprise, lasting around 20-60 minutes.

"Psalm 5:9-13" is a first-person walking simulator with a VHS filter, offering a 30-minute journey into a terrifying location. The game features realistic graphics, high-quality sounds, and an atmosphere filled with tension and anomalies. Prepare to face frightening events as you explore and uncover the dark secrets hidden within.