# OpenXcom/OpenXcom

Open-source clone of the original X-Com 👽

Repository: https://github.com/OpenXcom/OpenXcom
Canonical: https://ross.abutalabs.com/products/openxcom
Homepage: https://openxcom.org
Language: C++
License: GPL-3.0
License Family: copyleft
Topics: c-plus-plus, sdl, xcom, video-game, openxcom-game, strategy-game-engine, xcom-ufo-defense, xcom-terror-from-the-deep, turn-based-combat, ufo-defense, game, ufo
Last push: 2026-06-05T21:25:38+00:00

## Health v2 (maintenance only)
Score: 71/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 86, release rhythm 35, longevity 100
- inputs: {"age_days": 5687, "days_push": 89, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2212, forks 575 (observed 2026-08-28T04:06:26.881987+00:00)

## What it is
OpenXcom is an open-source C++/SDL reimplementation of the classic strategy games X-COM: UFO Defense and X-COM: Terror From the Deep, requiring the original game resources. It fixes bugs and limitations of the original engine while adding extensive modding support.

## Use cases
- play x-com ufo defense on modern systems without dosbox
- run terror from the deep natively on linux
- mod x-com with new rulesets and content
- fix original x-com bugs like item limits and funding overflows
- play classic x-com with community mods
- recreate the original x-com experience with a modern codebase

## When to choose
- you own the original X-COM games and want to play them natively on modern OSes
- you want a bug-fixed, moddable version of classic X-COM
- you want to develop or install community mods for X-COM

## When to avoid
- you want the most feature-rich modding platform - use OpenXcom Extended (OXCE) instead, which is the officially recommended successor
- you want a modern X-COM game like XCOM: Enemy Unknown (2012)
- you don't own a copy of the original game resources

## Facets
- artifact type: application
- maturity: maintenance
- function: game-engine, gui
- domain: gaming-tools, cross-platform
- platform: windows, cpp, cross-platform
- tags: xcom, turn-based-strategy, sdl, game-clone, moddable, retro-gaming, game-development, linux, macos

## Member repositories
- OpenXcom/OpenXcom (main) score 71

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:26.881987+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 2026-08-30T02:46:02.225289+00:00, confidence not recorded.
  - readme: https://github.com/OpenXcom/OpenXcom (fetched 2026-08-28T04:06:26.881987+00:00, sha 45e20ad501cb)
  - homepage: https://openxcom.org (fetched 2026-08-29T10:26:23.426587+00:00, sha 0dd9f7bd4a77)
  - site_page: https://openxcom.org/about (fetched 2026-08-29T10:26:23.436138+00:00, sha 037a72d7bbd1)
- Data as of 2026-08-30T08:39:29.467469+00:00.