Portal 2 gets a browser port, and it runs without third-party launchers

Slant's browser port lets Portal 2 run directly in a web browser, and the classic Valve puzzle game is available without third-party launchers, cloud services, or a full game download. The project went live on August 8.

Built on Emscripten, WebGL, and WebAssembly, the port uses a separate canvas for 3D rendering so it behaves like a full web app rather than a simple page with embedded video. The result is a version of Portal 2 that launches in-browser and keeps the original feel intact.

Slant also added a few practical touches. Save data is stored in the device's internal storage, and the cache can be cleared from the interface with a dedicated button. According to the developer, the browser version supports single-player mode, and players can also experiment with the game settings.

In the test video, the gameplay was described as unchanged: it is still the classic Portal 2. Slant said the porting work takes a huge amount of time, which is why he even asked fans to recommend anime series to watch in the background while working.

This is not his first browser port. Slant previously brought Half-Life 2, Counter-Strike: Global Offensive, Portal, and Team Fortress 2 to the web, and he is now experimenting with a similar browser version of Garry's Mod.

Would you rather play Portal 2 in a browser, or do you still prefer a traditional PC install?