Where to buy
No live listings
No store is currently listing this game.
We only show prices a provider actually returned — never a placeholder.
Price history
Observed by GamePrice
Not enough observations yet. History starts the first time we see this game and grows from there — we never back-fill a price we did not record.
Players
Concurrent Steam players · sampled just now
Playing now
0
24h peak
0
7d peak
0
From the developer
Official Steam announcements for this game
Catalyst Update - Available Now
The Catalyst Update is now available for all players! I'm most likely going to forget a few changes, but here's the ones I can recall: FEATURES - A new act featuring 7 new levels - A new NPC - Simplified Chinese support - 4 new tutorial levels - An Undo button...
2y ago
Catalyst Update Release Date (+ free copies for content creators)
Hello everyone! Hope you're having a good Halloween. I'm excited to announce the release date for the upcoming Catalyst Update. The Catalyst Update will release on November 10th, 2024 That's just 10 days away! I hope you'll enjoy the new content as much as I e...
2y ago
COMING SOON*: Free Catalyst Expansion + Chinese Translation
Hello everyone! Hope you're having a good summer. I've been working hard during my free time over the past few months on a new content update for Photochemistry to flesh out the systems and lore of the game. I'm happy to now announce what I've been up to. The ...
About
Photochemistry is a challenging 2D puzzle game about synthesizing chemicals to sustain plant life in a post-apocalyptic setting. Design and construct elaborate mechanisms to produce complex compounds from simple particles.