This game creation toolkit was release by three different publishers:
- Mirrorsoft in 1984
- Mastertronic in 1984/1985
- Codemasters in 1987
This tool was created by David Darling & Richard Darling, who later founded Codemasters. The first version of this tool seem to have been edited in 1984 by their first company, Galactic Software, under the title "Games Designer" for the Commodore VIC-20.
Includes 3 sample games to demonstrate the versatility of the system.