Flat 9

About

Flat 9 is a single player simulation game with a horror theme. It was developed by Alessandro Arcangeli and was released on March 18, 2025. It received overwhelmingly positive reviews from players.

Sent to investigate an abandoned apartment, you are tasked with documenting strange occurrences using the A.D.D. (Anomaly Detection Device)—a specialized tool capable of detecting and repairing irregularities. At first, the apartment seems perfectly normal, but as you explore, reality starts to shift. Objects move on their own, shadows flicker unpredictably, and unnatural occurrences manifest a…

Genres & Tags

Play Modes

Single-Player

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100%

Audience ScoreBased on 17 reviews

atmosphere2 positive mentions

gameplay3 negative mentions

Engaging and clever anomaly detection gameplay with a balanced difficulty that keeps players on edge without being overly punishing.
Effective horror atmosphere with well-designed scares that avoid cheap jump scares, making it suitable even for younger or sensitive players.
Thoughtful progression system that penalizes mistakes without heavy frustration, combined with a rewarding final challenge and a Collector Mode for completionists.

Short overall length limits replayability and depth, leaving players wanting more content or variety.
Some technical issues including poor optimization, graphical glitches like motion blur and texture quality inconsistencies that can detract from immersion.
Visual effects inside the apartment can be overwhelming or cause discomfort despite available settings, indicating a need for further customization options.

gameplay
6 mentions Positive Neutral Negative
17%
33%
50%
The gameplay is engaging and cleverly designed, combining observation-based mechanics with occasional jump scares to create a tense and exciting experience. It strikes a balance between challenge and accessibility, making it stand out among similar games without being overly difficult or lengthy.
- “I just finished Flat 9 and it genuinely stands out thanks to a few really smart gameplay mechanics.”
- “It’s not the hardest anomaly-finder out there, but it’s far from simplistic, and its mechanics help it stand apart from similar games.”
- “This is a nice experience that combines observation-based gameplay with occasional jump scares.”
- “The core mechanic of spotting differences between room iterations is engaging and keeps you on edge, making every playthrough tense and exciting.”
atmosphere
3 mentions Positive Neutral Negative
67%
33%
The game's atmosphere is praised for its well-crafted, slightly eerie tone that enhances the spot-the-difference experience, though some users find the graphical effects occasionally overwhelming. Overall, it provides a compelling and engaging ambiance.
- “A fun and atmospheric spot-the-difference game.”
- “This game is a nice take on the exit 8 style, offering a solid spot-the-difference experience with a slightly eerie atmosphere.”
- “Additionally, while the eerie atmosphere is well-crafted, the graphical effects can sometimes feel overwhelming.”
graphics
3 mentions Positive Neutral Negative
100%
The graphics are generally praised for their quality, including good reflections and an effective eerie atmosphere, though some graphical effects can feel overwhelming. Optimization issues and performance on lower settings are noted as areas needing improvement.
- “Additionally, while the eerie atmosphere is well-crafted, the graphical effects can sometimes feel overwhelming.”
- “Overall, the game itself is fun and worth playing, but it needs some work in optimization and the graphics/motion departments.”
- “It looks really good with high-quality reflections and details, but nothing looks good on the low graphics setting.”
replayability
2 mentions Positive Neutral Negative
50%
50%
The game offers an enjoyable experience with a unique twist, but its limited variety and ease after multiple playthroughs result in minimal long-term replayability.
- “However, the limited number of differences can make the game feel a bit too easy after several runs, reducing its long-term replayability.”
optimization
2 mentions Positive Neutral Negative
100%
The game is enjoyable but suffers from poor optimization, leading to performance issues that need improvement alongside graphics and motion enhancements.
- “Poor optimization.”
- “Overall, the game itself is fun and worth playing, but it needs some work in optimization and graphics/motion departments.”
story
1 mentions Positive Neutral Negative
100%
The story is generally minimal and lacks depth, with the games focusing less on narrative and more on other aspects.
- “These games don’t bother with deep storytelling.”