# LEGO Island (decompilation)

A decompilation of LEGO Island (1997)

Repository: https://github.com/isledecomp/isle
Canonical: https://ross.abutalabs.com/products/lego-island-decompilation
Language: C++
License: LGPL-3.0
License Family: copyleft
Last push: 2026-08-15T22:14:04+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 98, longevity 87
- inputs: {"age_days": 1224, "days_push": 18, "days_rel": 18, "gap_med": 0, "n_releases_24m": 2}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3461, forks 145 (observed 2026-08-28T04:08:05.678679+00:00)

## What it is
A functionally complete reverse-engineered decompilation of the 1997 game LEGO Island, reconstructing C++ source code that matches the original machine code. The companion isle-portable project adapts that codebase to run natively on modern platforms and the web.

## Use cases
- play lego island on modern systems
- study the source code of a 1997 pc game
- port a classic windows game to linux or web
- preserve an abandonware game executable as readable code
- mod lego island with a rebuilt codebase

## When to choose
- you want the most accurate, faithful reconstruction of the original LEGO Island binaries
- you need a reference for reverse-engineering or game preservation work
- you want to build mods or ports on top of the original game logic

## When to avoid
- you need a byte-for-byte identical match of the original executables
- you want a modern game engine or a from-scratch remake rather than a decompilation
- you need a game that runs out of the box without owning the original game assets

## Facets
- artifact type: application
- maturity: active
- function: game-engine, reverse-engineering, graphics
- domain: reverse-engineering, gaming-tools, cross-platform
- platform: windows, cpp, cross-platform
- tags: decompilation, retro-gaming, lego-island, game-preservation, cmake, isle-portable, game-development, web-server

## Member repositories
- isledecomp/isle (main) score 95
- isledecomp/isle-portable (mirror) score 81

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:05.678679+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:36:54.704923+00:00, confidence not recorded.
  - readme: https://github.com/isledecomp/isle (fetched 2026-08-28T04:08:05.678679+00:00, sha 3a7f834ec869)
- Data as of 2026-08-30T08:39:29.467469+00:00.