OpenRFReturn Fire, native again

A faithful, from-scratch reimplementation of the 1996 classic, using the data from your own CD. Runs natively on macOS, and on Linux, Windows and in your browser through the gasm WebAssembly runtime.

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How it works

Faithful

Game logic, physics, AI and rendering are ported function by function from the original executable, in the same fixed-point maths. The renderer is verified pixel-identical against a reference implementation.

Your original data

Reads the sprites, maps, movies, sound effects and the orchestral score straight from the Return Fire CD. No assets are included or converted.

Native

Portable C11 and SDL3 with no emulator, no Wine and no virtual machine. Available now as a universal macOS app (Apple Silicon and Intel); native Windows and Linux builds are in the works.

Runs on gasm

One openrf.wasm for macOS, Linux, Windows and the browser, on the gasm WebAssembly game runtime. Deterministic and pixel-identical to the native app, with ready-to-run bundles for each system.

Running on gasm

In the browser

The same engine as a WebAssembly module on the gasm runtime. Choose your CD folder once and play in Chrome, Edge, Firefox or Safari, with sound, gamepads and two players on one keyboard.

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Complete experience

Intro movies, the bunker lift, all four vehicles, turrets, drones, the submarine, soldiers, the flag hunt, victory movies and high scores.

Built for gasm

The Linux, Windows and browser versions, and Return Fire (gasm).app on the Mac, are one WebAssembly module, openrf.wasm, running on gasm, a portable game runtime. It is the same engine as the native app with a different platform layer: the same inputs give the same frames and sound on every runner, checked hash for hash. Download a bundle, play in the browser or read Running on gasm.

Screenshots