X-Tension is an expansion pack to X: Beyond the Frontier. The Earth pilot Kyle Brennan has vanquished the evil Xenon, and now finds himself stranded in space. His ship is reverse-engineered, and, with some credits in hand, he has nothing else to do but to kill some time. Unlike X: Beyond the Frontier, there is no main plot in the game. The gameplay is open-ended; the player is free to choose to be a trader or a bounty hunter, and undertake any missions and quests in any order. (mobygames.com)