: You must own a legal copy of the original game files (from Steam or GOG) for OpenXcom to work, as it uses the original's assets (graphics and sound) to run. Play in Browser

The most reliable and safe way to download the game is through official digital storefronts, which typically include a pre-configured version of DOSBox to ensure it runs on modern systems.

If you purchase the game, it is highly recommended to use , an open-source reimplementation of the original game engine.

: An authorized vendor that sells Steam keys for the game.

: It fixes numerous bugs from the 1995 original (such as the 80-item limit and research dead-ends) and allows for native high-resolution support.

: Available for $4.99 . It is also included in the X-COM: Complete Pack for $14.99 , which features five classic titles in the series.

: Another authorized retailer offering the game for around $4.19 . Recommended Way to Play: OpenXcom

While is not legally available as a free standalone download, it can be purchased for a low cost from several official retailers. Because the game is still actively sold and copyrighted by 2K Games, modern "free" downloads found on abandonware sites are generally not authorized by the publisher. Official Digital Retailers