X: Beyond the Frontier (1999) is a video game created by Egosoft for Windows. The first of the X series, it is a space trading and combat simulator game, mostly set in the fictional X-Universe. Upon release, it was frequently compared to the older Elite.An expansion, X-Tension, was released in 2000. Three full sequels have since followed: X2: The Threat in 2003, X3: Reunion in 2005 and X3: Terran Conflict in 2008. X: Beyond the Frontier and X-Tension were released in together as X-Gold in 2000.