Gesui Oukoku (2026)

Platforms: Android, iOS, Nintendo Switch
Genres: Strategy
Where to get it: Website

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 quietly instructive tower defense where you methodically manage water flow and treatment, feeling calm and orderly as you learn about sewage systems.

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About

A tower defense game that educates about water and sewage treatment, produced by the real-life water treatment company Meidensha.

Screenshots

More games like this

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.