Last 7 days · history since Nov 1, 2026
Screenshots, achievements, specs, every price change and sale we've seen on Steam, and trading cards.
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Steam prices for United States (change the country in the top bar), and Steam keys from authorized stores.
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100% positive of 1 · 1 user reviews · Live from Steam
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Free on Steam. The demo has its own app, so its players are counted separately.
Blast through space as Matty Matter — a hand-drawn roguelite shooter with original jazz, enemies that attack to the beat, and the entire periodic table to explore. Learn science. Feel the rhythm. Save your friends.
Live data from Steam, tracked by SteamPlayerBase.
What changed on Steam for this game since we started following it: prices and sales, builds, name, release date and review score.
Review score: 100% on 2026-11-01 → 100% today (1 reviews)
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Not tested by Valve yet. Results from Valve's own testing.
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Every build released on Steam for this game since we started tracking it, with the developer's patch notes. Updated within minutes of each new build.
Finally an educational game that you'll want to play. What's the Matter? is a twin stick shooter with rogue-lite elements releasing March 1st. Play as Matty, a little bit of matter, as he goes on rescue missions throughout the universe. Progress through the Pe…