User summary: Dark Continents is a sourcebook providing background and adventures set in a colonial genre during England's period of foreign colonization of Africa. The information includes both historical and supernatural elements. Intended as a supplement for To Challenge Tomorrow, the publisher also advertised it as compatible with Call of Cthulhu, GURPS, and Hero System. This item won the 1990 Sigma Award for Best RPG Aid. The sourcebook was reprinted at least once in 1992.