The Great War of the Worlds for OpenXcom is a free total conversion mod that transports players into an alternate timeline where Martians invade Earth in the early 20th century. In this unique adaptation of H.G. Wells' narrative, players command an elite unit of the International Expeditionary Force, battling against the Martian threat that has escalated in intensity since its initial invasion inThe mod features detailed sprite designs and a rich historical backdrop, immersing players in a world of strategic warfare and fantastical dieselpunk aesthetics.

The gameplay revolves around tactical combat, resource management, and unit customization, offering a nostalgic yet fresh experience for fans of the turn-based strategy genre. With contributions from a dedicated development team, the mod enhances the original mechanics of OpenXcom while introducing new elements that reflect the complexities of war in this reimagined universe. Players can expect engaging missions across diverse terrains, complemented by an atmospheric soundtrack that sets the tone for this epic struggle.