18+
Short description
Collection of logic riddles.
- Developer
- KuKo
- Publisher
- KuKo
- Release
- Tue, Jul 03, 2018
- Price
$0.99
$0.49
51%- Reviews
- 535
- Positive
- 75%
- Followers
- n/a
- Owners (estimated)
- 50K – 100K
- Concurrent players
- n/a
- Genres
- Casual
- Tags
Review count and SteamSpy's owner range disagree, so the band is widened to cover both rather than picking a favourite. Multiplied by $0.80, the average price these copies actually sold for — weighted from the price history rather than taken from the $0.99 launch price. That is 19% below list price on average. Before Steam's cut, VAT and refunds. How these numbers are calculated.
Waiting for 18+ to get cheaper? Name your price and we will email you when it gets there.
Media
History
3 data points since Jul 23, 2026. Gaps mean nothing changed — the value carries forward.
The blurred area is the rest of the history. 238 further data points reach back to Jul 1, 2018 — your plan shows the last 90 days of it. How far each series in particular reaches is written on its own chart; not every one of them goes back that far. The shape in the blurred area is decoration, not data: the figures are not in this page at all. Plus unlocks the complete series.
The dashed line marks Jul 28, 2026, when steamlense started measuring. Everything to its left was backfilled from public sources — monthly review counts from Steam, price changes from IsThereAnyDeal, monthly player averages from SteamCharts. Those are monthly figures, so the curve is coarser there — one point a month instead of one a day.
Lowest recorded price: $0.28 on Nov 14, 2022.
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 18+. 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) |
|---|---|---|---|---|---|---|---|---|---|
|
Yokai's Secret | Double W 4 titles | 5 | − Psychological Horror + Hentai | $1.99 | 6,528 | 90% | Thu, Feb 06, 2020 | $585k $398k – $995k |
|
Pretty Angel | GirlGames 14 titles | 5 | − Psychological Horror + Hentai | $0.99 | 3,170 | 92% | Fri, Dec 13, 2019 | $141k $99k – $198k |
|
Wet Girl | Wet Girl 2 titles | 5 | − Psychological Horror + FPS | $0.99 | 2,754 | 80% | Wed, Jan 30, 2019 | $198k $198k – $218k |
|
Seek Girl Ⅳ | DSGame 22 titles | 5 | − Psychological Horror + Action | $1.99 | 1,853 | 75% | Thu, Jan 09, 2020 | $125k $125k – $185k |
|
Seek Girl Ⅶ | DSGame 22 titles | 5 | − Psychological Horror + Hentai | $1.99 | 1,198 | 71% | Fri, Dec 11, 2020 | $102k $95k – $181k |
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.