Hentai Sin (2026)

Developer: Boom 18
Platforms: Windows
Genres: Casual, Indie, Simulation
Rating: 3.3 of 5, 6 player ratings
Typical playtime: about 12 minutes
Where to get it: Steam

The 3D catalog: game boxes on wooden shelves, with the cat sitting at the counter next to its greeting.

The catalog in 3D

The same catalog has a room you can walk around in. The cat behind the counter is the AI Catbot, and they pick real games from it when you tell them what you feel like playing. Nothing is for sale, here or in there. Go in from here and this game is already out on the counter, with more like it waiting on the shelf next to it.

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How it feels

A straightforward, anxiety-free puzzle game of rearranging shuffled tiles one swap at a time.

relaxingcasualcalmsatisfyingswap-basedpuzzleobservationlogic

What players say

Players solve simple jigsaw puzzles to unlock short animated clips, with mixed opinions on the amount of content and cost.

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More by Boom 18

This page is from Underplayed Gems, a catalog of older and overlooked games. Not quite it? You can browse by platform and genre, or take this one into the 3D catalog and ask the Catbot for something closer.