Porting Terraria and Celeste to WebAssembly

In plain words

This project ports the games Terraria and Celeste to WebAssembly, enabling them to run directly in web browsers. It targets players who want to enjoy these titles without downloading native applications. The work focuses on adapting these complex games to web technology while maintaining their core gameplay and mechanics.

written from the facts on this page · September 2026

From the sources

(tldr: terraria in the browser here , celeste in the browser here . terraria git repository , celeste git repository ) One of my favorite genres of weird project is "thing running in the browser that should absolutely not be running in the browser". Some of my favorites are the Half Life 1 port that uses a reimplementation of goldsrc, the direct recompilation of Minecraft 1.12 from java bytecode to WebAssembly, and even an emulated Pentium 4 capable of running modern linux . In early 2024 I came across an old post of someone running a half working copy of the game Celeste entirely in the browser. When I saw that they had never posted their work publicly, I became about as obsessed with the…from velzie.rip

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