The announcement
One minute of Eternal Silver, its battles and mods, the decomp and the Asset Viewer, to the game’s own music.
One project, three parts
Eternal Silver preserves Lunar: Silver Star Story Complete from the inside out: play the game in Eternal Silver, look inside your discs with the Asset Viewer, and read how it all works in the decomp, the game’s program as C that rebuilds it, byte for byte, and the reference the other two are built from.
Lunar: Silver Star Story Complete, whole, in TypeScript: played from your own disc, on desktop and Android, and built to be modded. Alpha testing
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Look inside your own Lunar discs: walk every map, watch every sprite move, hear every song and voice, read every line. Coming soon
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The game’s own program, decompiled to C that builds the original, byte for byte. The reference everything else is built from. On GitHub
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I · Play it
A TypeScript reimplementation of the Lunar engine
Eternal Silver plays Lunar: Silver Star Story Complete from your own disc, as a desktop app and an Android app. The title, the towns and the world map, people, doors and scenes with their voices, music and movies, fights, the field menu, shops, saving and loading: the story from its opening on.
It is also an engine for Lunar games that anyone can mod, the way RPG Maker is for its own. The Silver Star Story is one game built on it, and mods add to it or stand beside it.
Games · Add-ons · Data packs
The Silver Star Story is a base game on the engine’s public API, made the way any mod is made. Mods add to a game or stand beside it as games of their own: Hello Meribia, a small game made of data alone, shows how.
Includes
Replay your favorite battles… or create custom ones! Even a mirror match.
Transcribed from the decompilation, which is the reference whenever there is doubt. The aim is “effectively perfect”: a difference a player would notice is a bug.
Nothing of the game ships with the app. It reads your own disc and makes the game’s data on your machine: a data pack, one per disc, never shared.
Coming soon
A new game mode mod based on Lunar SSSC!
II · Explore it
Look inside your own copies of the Lunar games
Walk every map and click the people standing on it, watch every sprite and monster animate, read every line of dialogue with its portrait, listen to the soundtrack and every voice line, look up items, spells and monsters, watch the movies, and save any picture or song you like.
A free desktop app. It reads disc images you make from your own discs, never changes them and never goes online.
The overworld, every town and every dungeon, drawn as the game draws them, with their people, monsters and chests moving. Click anyone to see who they are.
Everyone’s animations, on the map and in battle, and every fight in its arena: where it is met and what it plays.
Stats at every level, magic and starting equipment, and every face shown beside the dialogue.
The soundtrack by the game’s own titles and where each song plays, every voice line by who says it, and every sound effect.
The animated scenes with their sound, from each disc you add.
III · Understand it
The game’s program, decompiled to matching C
A matching decompilation of Lunar: Silver Star Story Complete (PlayStation, North America, 1999): C source that, compiled with the compilers the game was built with, produces the same bytes as the original program.
“Matching” is a checked claim, not a description. make builds each program and compares it with
the original byte for byte, and ends with an OK line, or fails.
None of the game’s files are in it. The build cuts the program out of your own disc image, keeps it only if its sha1 is the one the tree declares, and takes from it the bytes not yet written as C.
$ make
OK: 0xa8000 bytes, sha1 900ce6a9dfa9563ef7e0a129602945d1303436d8out of scope for now
Measured by make status on 2026-10-20. “To decompile” leaves out what was assembly in the original
and Sony’s library code still read as bytes.
Jul 23
The compiler is pinned down as GCC 2.8.1 at -O2 -G8, and the first 67 functions match, one at a time.
Aug 2–10
Splitting the code again uncovers 515 functions glued inside others. m2c drafts them, and a ladder of searches mutates each near-miss until its bytes match.
Oct 2–7
A 27-billion-parameter model on one desktop GPU drafts what m2c could not, and the searches spread to a laptop.
Oct 8–10
Claude Code agents read the assembly and write the C, one function each: 959 functions and 73% of the code land in two days.
Preservation, done right
Nothing of the game is in any of these projects: no disc image, no file from a disc, no program image. You make images of the discs you own, and each tool builds what it needs from them, on your computer.
Lunar: Silver Star Story Complete for the PlayStation, the North American release. The Asset Viewer also reads the Japanese one, and Lunar 2 in part.
Copy each disc with a disc-imaging program as a .cue file with its .bin files: a raw copy of every track.
Eternal Silver builds the game’s data from your disc, the Asset Viewer reads it, and the decomp checks its build against it.
Questions
Yes. None of these projects hold any of the game’s files. Eternal Silver and the Asset Viewer read disc images you make from your own discs, and the decomp’s build takes the program it compares against from your disc image.
The decomp’s C, compiled with the compilers the game was built with, produces the original program exactly. Every build checks it, byte for byte, and fails if a single one differs.
It is transcribed from the decompilation, which is the reference whenever there is doubt. The aim is “effectively perfect”: a difference a player would notice is a bug; one only a machine can measure is fine.
That is the point. Eternal Silver is an engine for Lunar games, the way RPG Maker is for its own: a mod can be a game of its own, an add-on to a game, or a data pack. The Silver Star Story itself is built on the same public API. Battle Arena and Hello Meribia show how.
Eternal Silver: Windows, macOS, Linux and Android. The Asset Viewer: Windows, macOS and Linux.
Yes. Each project is free and open source, and the author’s own work in it is MIT-licensed. The games are their owners’, and nothing of them is in these projects.
No. It is a fan-made project, not affiliated with or endorsed by Game Arts or GungHo Online Entertainment.