debuff vs Unity for browser games
Unity is the default engine for a huge number of games, and it can build for the web. debuff is a small TypeScript toolkit made only for the browser. If you're deciding how to make a 2D game that people play from a link, here's how they compare as of October 2026.
Short answer
Pick Unity if you need its editor, asset store, 3D, or native platforms alongside the web, or if your team already knows it. Pick debuff if the browser is the main target and you want tiny builds, plain TypeScript, and a free agent loop on the running game.
At a glance
| debuff 0.2 | Unity 6.3 LTS (Web platform) | |
|---|---|---|
| License / price | MIT, free | Personal is free under $200K revenue or funding in the last 12 months; Pro above that (unity.com/products) |
| Language | TypeScript | C# |
| Editor | None (dev overlay) | Full editor, 2D and 3D, asset store |
| Web rendering | WebGL2, Canvas 2D fallback | WebGL2 by default; WebGPU is experimental and "not recommended for production" (docs) |
| Mobile browsers | Any browser with WebGL2 or Canvas | iOS Safari 15+ and Android Chrome 58+ (compatibility) |
| Web build | JavaScript; starter about 13 kB brotli | Engine as WebAssembly plus your content; no official size figure |
| Testing | Scenarios, screenshot baselines, fuzz | Unity Test Framework |
| AI agents | Free MCP server for the running game | Unity AI with an official MCP server; concurrent MCP connections depend on plan (unity.com/products); popular community unity-mcp |
| Community | Small | Enormous |
Where Unity is stronger
- Everything around the engine. The editor, asset store, 3D, animation tools, and native builds for every major platform.
- Hiring and knowledge. More developers, tutorials and answers than any other engine.
- Agent tooling at scale. Unity AI works inside the editor, and the community unity-mcp server has around 15k GitHub stars.
- Testing. An official test framework for automated tests.
Where debuff is different
- Built for the web first. No engine runtime to download before the game starts. The starter game ships at about 13 kB brotli, which matters on portals where players leave during a loading bar.
- No thresholds or metering. MIT licensed, and the MCP server works with any client, with no per-plan connection limits.
- Deterministic by default. Fixed steps and a seeded RNG mean scenarios, replays and fuzzing work without extra setup.
- An agent on the tab you're playing. Flag a moment in the overlay, and the agent reproduces it exactly with
game_replay. See the agent comparison.
Which to choose
If the web is one of several targets, or you need Unity's editor and ecosystem, use Unity. If the browser is where your game lives and you want it small and testable, try debuff:
bash
npm create debuff@latest my-game