Rank 01Why this
Also Mature and Hentai, like 18+.
- $0.99 (Price checked Nov 7)
- Deck Verified
- 2020
The closest matches to 18+: Pretty Neko, CATGIRL LOVER 2, Lost, Seek Girl Ⅳ, and Dark Fantasy: Jigsaw Puzzle. Ranked by imho.run from Steam co-play data, shared tags and reviews.
Rank 01Why this
Also Mature and Hentai, like 18+.
Rank 02
Rank 03
Players highlight
Free games the recommender matches to 18+, limited to titles with at least 500 Steam reviews and 80% positive.

Why this: Also Mature and Hentai, like 18+.



Valve-Verified or Playable picks from the similar pool — ready to go on Deck out of the box.

Why this: Also Mature and Hentai, like 18+.


Why this: Shares achievement hunting with 18+.
Other recommendable Steam games by KuKo, ranked by review count so the studio's hits land first.

Why this: Also Mature and Hentai, like 18+.

Why this: Same chill mood as 18+.

Why this: Shares achievement hunting with 18+.





Why this: Same relaxing mood as 18+.
The closest matches to 18+: Pretty Neko, CATGIRL LOVER 2, Lost, Seek Girl Ⅳ, and Dark Fantasy: Jigsaw Puzzle. Ranked by imho.run from Steam co-play data, shared tags and reviews.
If 18+ is your kind of game, the closest matches are Pretty Neko, CATGIRL LOVER 2 and Lost — picked from the ranked list below. Reviewers describe it as chill, contemplative and relaxing, and single out its achievement hunting and lateral thinking challenges. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.
About 18+: Collection of logic riddles with 5,000 achievements..
Mostly recommended
A summary of what players say, not a promise you'll like it. Every signal is listed below.
The most up-voted negative English reviews in our sample, quoted as written.
“It's just an achievement game, you get the achievements but it doesn't count as a perfect game + you don't get the achievements on your account/profile. So unfortunately an L success game.”
People who play it also play: Pretty Neko, CATGIRL LOVER 2, Lost
18+ is rated Playable on Steam Deck — it runs, but expect some manual adjustments (control remapping, text size, or graphics settings) for the best experience.
18+ is listed on Steam at 0.99 USD (current store price; Steam sales may reduce this temporarily).
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside 18+ are Pretty Neko, CATGIRL LOVER 2, Lost.
18+ was developed by KuKo.