On May 9, 2012, a crowdfunding project through Kickstarter began for a sequel to DUX titled Redux: Dark Matters. It was released on PSN, XBLA, Steam, and iOS, as well as the Dreamcast. The latter was a limited edition limited to 1,000 copies. The Dreamcast version of Redux also facilitated the release of an upgraded version of DUX titled DUX 1.5, which includes additional improvements over the original release, as well as a remixed musical score.
DUX 1.5 Collector's Edition/DUX 1.1Edit
The DUX 1.5 Collector's Edition was released on April 28, 2014. It contains DUX 1.5, which has the improvements and remixed musical score of the regular DUX 1.5 release, as well as the original soundtrack and the remixed soundtrack from DUX 1.5.
It also includes DUX 1.1. This has the improvements of DUX 1.5 but has the original musical score.
The DUX 1.5 Collector's Edition was self-published by Hucast, and was limited to 300 copies.