The Legend of Zelda: Oracle of Ages

About this build

Oracle of Ages assembled from the Stewmath/oracles-disasm disassembly with WLA-DX v10.6 and run in the browser on a Game Boy Color core. The build is byte-identical to the US cartridge. You supply your own ROM; it is read in the page and never uploaded, and no game data ships with this project.

Built from

oracles-disasm build on the libretro gambatte core via EmulatorJS 4.2.3 (WebAssembly)

Type

Decompilation

Game files

You supply your own Oracle of Ages ROM (US release, 1,048,576 bytes, sha1 880374fb978b18af4aa529e2e32f7ffb4d7dd2f4). It is read in the browser and never uploaded.

Code licence

See the upstream disassembly; its reverse-engineered code belongs largely to Nintendo and Capcom and the author disavows commercial use

Assets

No game data is distributed; everything comes from the ROM you supply

Source

Stewmath/oracles-disasm ↗

What has been tested

Built byte-identical to the US cartridge (sha1 880374fb978b18af4aa529e2e32f7ffb4d7dd2f4). In the browser: created a file, reached the first overworld screen, and moved Link on command — verified by decoding the game's own save file and work RAM with the symbol table this build emitted, not from a screenshot. The battery save survived leaving the page byte-identically.

Last tested 2026-10-05 in Chrome 151 (headless, Linux). Full playthrough: not verified. How games are tested.

Known limitations

• Not hosted: the upstream disassembly disavows commercial use.
• Not yet playable here: no hosted page has been published for this title.
• Tested only as far as the first overworld screen: file creation, the opening and a few steps. Nothing past that is verified.
• Saving from the in-game menu was never tested; only the save the game writes when a file is created.
• Linked games, passwords and secrets between Ages and Seasons are untested.
• Checked in headless Chrome 151 on Linux only. No touch controls and no on-screen gamepad.
• Audio was muted throughout testing, so sound is unverified.

Saves

The cartridge battery save is kept in this browser's IndexedDB, keyed by your ROM's SHA-1, so Ages and Seasons never overwrite each other. Export and import it as a .sav from the toolbar. Clearing site data removes it.