Flat 9
Short description
A psychological horror set in a deserted apartment, where you're trapped in a relentless cycle. Armed with a strange device, you must find and report every anomaly to escape. Can you make it past Flat 9?
- Developer
- Alessandro Arcangeli
- Publisher
- Alessandro Arcangeli
- Release
- Tue, Mar 18, 2025
- Price
- $3.99
- Reviews
- 23
- Positive
- 100%
- Followers
- 90
- Owners (estimated)
- 0 – 20K
- Concurrent players
- n/a
- Genres
- Adventure, Indie, Simulation
- Features
- Partial Controller Support, Steam Timeline
- Tags
Review count and SteamSpy's owner range agree well enough to narrow the estimate down to this band. Multiplied by the $3.99 launch price — there is not enough price history for this game to weight the copies by what they actually sold for. Before Steam's cut, VAT and refunds. How these numbers are calculated.
Waiting for Flat 9 to get cheaper? Name your price and we will email you when it gets there.
Media
History
2 data points since Jul 31, 2026. Gaps mean nothing changed — the value carries forward.
The revenue curve is an estimate, not a measurement. It is the only calculated series here: each interval takes the review growth of that period, multiplies it by the sales-per-review factor and by the price actually charged at the time, and adds the result to the running total. That is why it climbs more slowly through discount periods than the review curve next to it. The last point is the same figure quoted above — gross, before Steam's cut, VAT and refunds. How these numbers are calculated.
Lowest recorded price: $3.99 on Jul 31, 2026. That is the current price.
Similar games that found an audience
Games sharing at least 3 of this title's leading tags, with enough reviews to have gone somewhere. Ranked by how much they overlap, not by how big they are. − missing and + extra mark the tags each one does not share with Flat 9. Studio counts the titles that developer has released — the closest thing to production scale that public data allows. It is not a budget, and nobody publishes those.
| Image | Name | Studio | Shared | Tag difference | Price | Reviews | Positive | Released | Revenue (estimated) |
|---|---|---|---|---|---|---|---|---|---|
|
Conarium | Stormling Studios 5 titles | 5 | − Simulation + Lovecraftian | $3.59 82% |
1,893 | 76% | Tue, Jun 06, 2017 | $1.4m $846k – $1.7m |
|
REVEIL | Pixelsplit 5 titles | 5 | − Simulation + Singleplayer | $19.99 | 729 | 86% | Wed, Mar 06, 2024 | $345k $251k – $345k |
|
Coma: Mortuary | Naga Entertainment first game | 5 | − Simulation + Atmospheric | $5.99 | 695 | 53% | Mon, May 12, 2014 | $142k $63k – $910k |
|
The Music Machine | David Szymanski 15 titles | 5 | − Simulation + Psychological Horror | $4.99 | 497 | 88% | Wed, May 06, 2015 | $98k $88k – $174k |
|
ShadowSide | AdroVGames 7 titles | 5 | − First-Person + Atmospheric | $9.99 | 374 | 64% | Fri, Aug 17, 2018 | $172k $172k – $258k |
There are more like this. Your plan shows the 5 closest neighbours; Plus and Pro show up to 100 — enough to see the shape of a niche instead of a sample of it.