Sleeper S9
Short description
Traverse the sleeper coaches of an apparent empty Indian train—or so it seems. If you see an anomaly, face it and move forward. If not, it may be a trick of the mind—return to the previous coach. But beware, some anomalies will do everything to stop you. Face them or be lost forever.
- Developer
- Nimmen Studios
- Publisher
- Nimmen Studios
- Release
- Thu, May 01, 2025
- Price
- $0.99
- Reviews
- 8
- Positive
- 75%
- Followers
- 23
- Owners (estimated)
- 0 – 20K
- Concurrent players
- n/a
- Genres
- Adventure, Casual, Indie, Simulation
- Features
- Full controller support, DualShock Controller Support, DualSense Controller Support
- Tags
Review count and SteamSpy's owner range agree well enough to narrow the estimate down to this band. Multiplied by the $0.99 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 Sleeper S9 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: $0.99 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 Sleeper S9. 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) |
|---|---|---|---|---|---|---|---|---|---|
![[Chilla's Art] The Convenience Store | 夜勤事件](https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/1228520/header.jpg?t=1662351577)
|
[Chilla's Art] The Convenience Store | 夜勤事件 | Chilla's Art 24 titles | 5 | − Mystery + Indie | $2.24 25% |
3,025 | 83% | Mon, Feb 17, 2020 | $395k $290k – $580k |
|
Water Delivery | Frozen Lake Software 2 titles | 5 | − Casual + Atmospheric | $2.09 65% best price ever |
201 | 86% | Wed, Sep 18, 2024 | $54k $24k – $96k |
|
Return to Shironagasu Island | HYOGO ONIMUSHI first game | 4 | − Simulation − Casual + Visual Novel + Anime | $4.99 | 3,973 | 94% | Mon, Mar 02, 2020 | $803k $449k – $898k |
|
The Death | Thần Trùng | DUT Studio first game | 4 | − Simulation − Mystery + Puzzle + Indie | $5.99 | 2,801 | 91% | Wed, Sep 14, 2022 | $1.2m $1.2m – $1.3m |
|
DEAD LETTER DEPT. | Belief Engine 2 titles +1 | 4 | − Adventure − Casual + Typing + Atmospheric | $14.99 | 1,758 | 95% | Thu, Jan 30, 2025 | $708k $498k – $708k |
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.