RamGang Collector Series was a series of shareware DOS games released on 3.5" HD diskettes. This series included many popular DOS games, most notably those by Apogee and id Software.
Some of the games included bonus collector cards. These cards consisted of the game's cover artwork on the front, and a summary of the game's story on the back. There were a total of 9 collector cards. There was also a competition where a set of foil-stamped cards was given away.
Card number 7 of 9 was Blake Stone: Aliens of Gold.