RERUN REACTOR

browser shell · bring your own game

This is a launcher for the open-source Fallout 2 Community Edition engine, compiled to WebAssembly. It ships no game content. You bring your own legally purchased copy; it stays on your machine, in your browser's storage, and is never uploaded anywhere.

Don't own it yet?

Buy on GOG  ·  Buy on Steam  — either edition works. Install it, then point this page at the install folder.

Import your game data

We need master.dat and critter.dat from the install folder. patch000.dat is strongly recommended, and the loose data/ folder carries the soundtrack.

Choose the install folder

Pick your Fallout 2 folder. Nothing leaves your machine — the browser copies it into local storage.

Or drop a .zip

Drag a zipped install here. The archive is read entry-by-entry straight off disk, so a multi-gigabyte file never has to fit in memory.

Or use your CD

Drop a .cue and its .bin together — or a lone .bin/.iso. The disc is read sector by sector in the browser; nothing is uploaded and nothing is unpacked to disk first.

A disc is version 1.0 — we'll offer the 1.02 patch afterwards.

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Sound needs a click before it can start — browser rule, not ours.

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Save archive

Slots mirror the engine's own SAVEGAME/SLOT## folders. Exports are plain .zip archives — they drop straight into a desktop install, and vice versa.

Display

This is the size the engine draws the world at, not a zoom level. The interface art is a fixed 640 pixels wide whatever you pick, so each setting pairs a resolution with a whole-number magnification — that is what keeps the HUD readable while the map gets bigger. Some of the game's smaller maps run out of world before they fill the largest settings, and show black at the edges.

Game data

Resetting erases the imported game data and every save stored in this browser. Export anything you care about first.

This is Fallout 2 version 1.0

Your disc is the original release. The official 1.02d patch fixes serious bugs — among them broken quests, a car that can vanish permanently, and save corruption. Almost nobody plays 1.0 on purpose.

The patch is a single file, patch000.dat. We don't host it and we never download it for you — it's Interplay's, and this app ships no game content. Get it from one of these, then drop it below.

Also own it on GOG or Steam? Those editions are built from the European release and already sit at 1.02, so importing that install folder is usually the shortest route — check it for a patch000.dat first, because whether one is present varies by store and platform. The patch below is the US 1.02d, which is the right one for a US retail disc.

No Mutants Allowed and ModDB both carry this patch too. We haven't linked them because neither would answer us when we checked, and we won't ship a link we couldn't open — search either site for “Fallout 2 patch 1.02d” if the above are down.

Drop the patch here

A patch000.dat, or the .zip you downloaded — we'll pull the .dat out of it. We check it really is a Fallout 2 archive before it goes anywhere near the engine.

You can add the patch at any time from the launcher — nothing is lost by playing first, though saves made on 1.0 are best restarted after patching.