1.0 / 1.1 is the original release of Tyrian. This version was originally distributed as shareware, as was common at the time.
The shareware version could be downloaded for free from Epic Megagames FTP server. This version came only with the first episode, which when completed would prompt the player to buy the full version.
The full version added the second and third episodes of the game, as well as some bug fixes. It also included the ship editor, which would later be available as a separate download.