# endless-sky/endless-sky

Space exploration, trading, and combat game.

Repository: https://github.com/endless-sky/endless-sky
Canonical: https://ross.abutalabs.com/products/endless-sky
Homepage: https://endless-sky.github.io/
Language: C++
License: GPL-3.0
License Family: copyleft
Topics: 2d-game, game, rpg, c-plus-plus, cpp, free, game-development, gamedev, multiplatform, opensource, adventure-game, opengl, space, open-source, exploration, indie, top-down, arcade-game, endless-sky, modding
Last push: 2026-08-26T10:14:46+00:00

## Health v2 (maintenance only)
Score: 88/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 66, longevity 100
- inputs: {"age_days": 4190, "days_push": 7, "days_rel": 67, "gap_med": 122.0, "n_releases_24m": 5}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 7519, forks 1303 (observed 2026-08-28T04:10:00.442450+00:00)

## What it is
Endless Sky is a free, open-source 2D space exploration, trading, and combat game inspired by Escape Velocity and Elite. Players captain a spaceship, earn money through trading, missions, and combat, and explore a galaxy of hundreds of star systems, with extensive modding support.

## Use cases
- play a sandbox space trading and combat game
- explore a galaxy and complete story missions
- buy and upgrade spaceships with trading earnings
- mod a space game with custom ships and plugins
- play an open-source Escape Velocity alternative on Linux

## When to choose
- you want a free, cross-platform space trading game with low system requirements
- you enjoy sandbox gameplay with optional storylines and modding support

## When to avoid
- you want modern 3D graphics or AAA production values
- you need multiplayer gameplay

## Facets
- artifact type: application
- maturity: active
- function: game-engine, graphics, simulation
- domain: gaming-tools, entertainment, cross-platform
- platform: windows, cpp, cross-platform
- tags: space-game, 2d-game, trading, sandbox, rpg, escape-velocity-like, modding, opengl, open-source-game, game-development, linux, macos

## Member repositories
- endless-sky/endless-sky (main) score 88

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:00.442450+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 2026-08-29T17:37:29.324163+00:00, confidence not recorded.
  - readme: https://github.com/endless-sky/endless-sky (fetched 2026-08-28T04:10:00.442450+00:00, sha bb8293287035)
  - homepage: https://endless-sky.github.io/ (fetched 2026-08-29T08:32:35.756529+00:00, sha 24682445d8a1)
- Data as of 2026-08-30T08:39:29.467469+00:00.