The system shipped with a customized version of MS-DOS 1.25 which first displays the Hyperion logo and then the various copyright messages. Though the Hyperion runs on MS-DOS, it is not an exact clone of the IBM PC and there are certain incompatibilities that pop up when running some programs. Notably, the Hyperion was unable to run MS-DOS 2.0 when it was released.
According to John Collins, an ex-Commodore Electronics employee in the UK, Commodore purchased a Hyperion from the UK distributor for Bytec around Christmas 1982 for evaluation purposes. After it's evaluation, it was recomended that Commodore design it's own PC-clone, vice licensing the Hyperion due to perceived problems with servicing the machine due to it's internal layout. This Commodore eventually did, the machine being done in its German subsidiary in Braunshweig. The problem is, this new machine wouldn't be finished in time for exhibition at CeBIT in Hannover in March 1983, so Commodore stuck its logo on several Hyperions, and exhibited these in its booth at Hanover. Apparently, Commodore never sold any rebadged Hyperions nor manufactured any itself.