Star Trek: Legacy is a 2006 real-time tactics space combat video game for Microsoft Windows and Xbox 360 developed by Mad Doc Software and published by Bethesda Softworks in association with CBS Paramount Television and CBS Consumer Products. Originally slated for release in the fall of 2006 to coincide with the 40th anniversary of Star Trek, the Windows version was not released in North America until December 5, 2006, and the Xbox 360 version until December 15. In Europe, both the PC version and the Xbox 360 version were released on December 22, 2006.

Star Trek is an American science fiction media franchise created by Gene Roddenberry, which began with the eponymous 1960s television series and became a worldwide pop-culture phenomenon. Since its creation, the franchise has expanded into various films, television series, video games, novels, and comic books, and it has become one of the most recognizable and highest-grossing media franchises of all time.