Chemistry Poker: turn two hydrogen cards and one oxygen card into water
A solo developer's roguelike deckbuilder, playable free in your browser

October 1, 2026 — Game introduction

Independent developer Rikuto Yasuda is introducing Chemistry Poker, a single-player roguelike deckbuilding game in which players combine element cards to make chemical compounds. The browser version is available free, with advertising on the website. This is an introduction to an existing game, not a new launch announcement.

Play in your browser: https://chemistrypoker.com/play/
English website: https://chemistrypoker.com/en/

1. Build molecules from your hand
Select two H cards and one O card to make H₂O. As you select a card, compatible cards light up, helping you find combinations without memorizing chemical formulas. Decide which cards to play, keep or discard to reach each experiment's target score within a limited number of reactions.

2. Shape your deck between experiments
Visit the shop to collect element cards and tools that improve scores and multipliers. The game includes 32 tools. Cards that bundle several atoms together let you build larger molecules using fewer cards.

3. Discover 300 compounds
There are 64 playable element types, an encyclopedia covering 118 elements, and 300 compounds to discover. Your discoveries are recorded in the encyclopedia, where you can revisit molecular structures and uses. Five difficulty levels, an endless mode and daily runs offer further challenges.

Facts
Title: Chemistry Poker / 化合物ポーカー
Developer: Rikuto Yasuda
Genre: single-player roguelike deckbuilding card game
Browser: free, with website advertising; internet connection required; no account required; supports mobile landscape play and adding to the home screen.
In-game languages: Japanese and English. Traditional Chinese is not supported.
iPhone: available in the Japanese App Store for a one-time ¥500 (JPY, tax included); no ads or in-app purchases; offline play; iOS 14.0 or later; landscape orientation. Availability and local prices outside Japan are not confirmed. The browser version is the link offered for international coverage.
Progress is saved locally. Browser and iPhone saves are separate.
Prices and availability checked on October 1, 2026 (Japan time).

Links and media
Press kit (three screenshots, releases and gameplay clip): https://chemistrypoker.com/press/en/
ZIP: https://chemistrypoker.com/press/en/chemistry-poker-press-kit.zip
Gameplay clip: https://chemistrypoker.com/press/en/gameplay.mp4
Japanese App Store: https://apps.apple.com/jp/app/id6814054750
The three screenshots show the English game UI, captured on Mac on October 1, 2026 at 1040×512. The silent gameplay clip is captured from the same running game. These are actual game captures, not physical iPhone footage.

Contact
Rikuto Yasuda — ricton513@gmail.com
https://chemistrypoker.com/