Unstable Nuclear Reactor – Hex-Grid Merge Puzzle Roguelite

11/12/2026, 4:13:44 PM (JST)

Release date: 11/10/2026

Tags: #puzzle #hex-grid #match-3 #roguelite #arcade #incremental #tactical #logic

Reference prices

Japan

¥ 632 (JPY)

Steam JP

$4.79 (USD)

Steam Global

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Live Store Snapshot

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Japan Price: ¥ 632
Global Price: $4.79
Price in Your Region: ¥632-20%Prices as Steam lists them per country. What you are actually charged depends on your Steam account settings.Regional prices checked: 14 Nov 2026
Sale Status: On sale
Price Checked At: 11/15/2026, 5:10:54 AM (JST)

Key highlight

A hex-grid merge puzzle roguelite where you fuse atoms, chain combos, and manage ring capacity while spending radioactive coins on upgrades.

Who this is for

Worth a look if you want merge-style puzzling with a roguelite upgrade loop and satisfying hex-grid chain reactions.

Details

Overview

Unstable Nuclear Reactor is an incremental hex-puzzle roguelite from developer Ali Boukeroui and publisher MXSGames, released on November 10, 2026 for PC via Steam. The premise is simple to grasp: you merge atoms into heavier elements, trigger chain combos, and collect radioactive coins while keeping your reactor's ring capacity under control. The longer you hold the system together, the further your run goes.

Highlights

Merging happens on a hex grid, so placement and chain reactions matter more than raw speed.
Radioactive coins feed an upgrade loop that unlocks new tools and expands what your reactor can handle.
Tool upgrades are built around amplifying combos and efficiency, giving each run a different rhythm.

The hex layout is the heart of the design. Standard merges are the safe route, but the real payoff comes from setting up cascading combos that clear space and generate coins in one sweep.

Because ring capacity is finite, every merge is also a small act of resource management — fill the ring carelessly and the reactor stalls. That tension between greed and control is what separates a short run from a long one.

Between attempts, coins go into upgrades and new tools. This is where the roguelite and incremental layers meet: progress carries forward in the form of stronger tools, while each run still asks you to solve the board in front of you.

The Steam tags back this up, listing puzzle, hex grid, match 3, roguelite, arcade, incremental, tactical, and logic.

Who It's For

This one suits players who enjoy compact puzzle runs with a persistent upgrade loop — think merge games crossed with light roguelite structure. If you like planning a few moves ahead and watching a chain resolve, the hex grid offers plenty to chew on. Those who prefer pure reflex arcade action may find the pace more deliberate.

Game Info

Developer: Ali Boukeroui
Publisher: MXSGames
Genres: Casual, Indie, Strategy
Release date: November 10, 2026
Platforms: PC (Steam)
Languages: English, French, Spanish - Spain, Japanese, Korean, Simplified Chinese, German, Russian, Indonesian, Portuguese - Brazil, Danish, Portuguese - Portugal, Italian
Steam features: Single-player, Steam Achievements

It is a paid title with an active discount or sale, so check the latest Steam listing for current pricing. User reception is not yet established, so Steam user reviews are the best place to gauge how the merge loop holds up over time.