Underplayed Gems

Sudoku: Unlimited Expansion (2026)

Sudoku: Unlimited Expansion cover
Developer
Hugh
Platforms
Windows, Linux
Genres
Casual, Indie
Where to get it
Steam

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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 slow-burning logic puzzle that gently ramps up complexity as the board grows and expands into larger layouts.

casualpuzzleexpandingprogressiverelaxingchallenginglogic

Screenshots

Sudoku: Unlimited Expansion screenshot 1Sudoku: Unlimited Expansion screenshot 2Sudoku: Unlimited Expansion screenshot 3Sudoku: Unlimited Expansion screenshot 4Sudoku: Unlimited Expansion screenshot 5

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More by Hugh

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.