pixelfx Is a Free Library of 244 Pixel Art Game Effects Written as Code, Not Sprite Sheets, From Fire and Ice to Whole Attack Moves

Game effects usually ship as sprite sheets, rows of hand-drawn frames that play in order. pixelfx skips the drawing. Each effect is a short program that simulates its particles at 120 Hz, keeps separate buffers for color and light, and uses seeded randomness so the same effect plays the same way every time.

The effects come in 21 categories, from 12 kinds of fire to 12 complete “moves.” Those moves are the part worth watching in the online gallery. “Twelve whole moves chain the effects into attacks from wind-up to recovery,” the README says, played out by a small 24-by-38-pixel stock character built on a 3D skeleton, “the way Dead Cells makes its sprites.”

The makers explain why the character is there at all. “An effect on its own looks like a sticker. What sells a hit is the body around it,” they write. A hit in pixelfx freezes the frame for a beat, set with a value like stop: 0.14, so the impact lands before the animation moves on.

The library comes from Patch, whose site at patch.gg says only “Coming soon” above a line about mashups, mods and browser games. It went up on GitHub on October 30, 2026 and passed 1,100 stars within a day.

The method behind it was published two days earlier. Hugo Duprez, who makes the Sprite Fusion tile map editor, wrote a guide to making pixel art effects with Claude on October 28. “Code is remarkably well suited for creating pixel art effects: I found image sprites way too rigid and limiting,” he wrote. His approach was to “treat code as clay,” and he’s blunt about who’s responsible for how it looks: “This is very important: it’s on you to set the quality bar.”

The repository’s own description still says 232 effects while its README counts 244, a sign of how fast it’s growing. Whether the count keeps climbing depends on how many people send in effects of their own.