Numerous lost games have been rediscovered and preserved thanks to the dedicated efforts of archivists and preservationists. Occasionally, unexpected finds surface, like Atarisoft’s unreleased Commodore 64 conversion of Stargate. Originally teased at trade shows but never officially released, this adaptation of the arcade hit Defender is now available to enjoy, thanks to the efforts of Ken Van Mersbergen and the team at GTW64.
For more on Stargate, see the GTW64 write-up on it.