This week’s Humble Weekly Sale includes six games from Egosoft’s space trading and combat sim series, X. Pay what you want for X: Beyond the Frontier, X-Tension, X2: The Threat, X3: Reunion with bonus package, and the soundtrack to X Rebirth. Fork over more than $6 to score X3: Terran Conflict, X3: Albion Prelude and its soundtrack, plus all the bonus material from the X: Superbox. All games are available on Steam for PC, with some Linux and Mac options. As ever, you choose how to split proceeds between the indie developer, organisers and charity. The bundle lasts just one week, so get on board.