To Challenge Tomorrow
Adventures Historical/Speculative was an early supplement for To Challenge Tomorrow and presented four scenarios for the science fiction setting. The scenarios ranged from "hard" science fiction to space opera in tone. Although it was published during the 1st Edition period of the game it remained a useful resource throughout the next several editions.
The first edition of To Challenge Tomorrow was sold as a box set (three booklets and character sheet), (apparently) as a bagged set of three booklets, and as individual booklets. The box/bag set included: