Monograph #0305 published by the Miskatonic University Library Association.
"Call of Cthulhu Roleplaying At the World's End"
A future history setting for Call of Cthulhu, set in 2147 and featuring a timeline from 2020. Investigators are among the lucky (?) few to survive on Mars after the coming of the Great Old ones to Earth.
Includes new skills, rules, creatures and details of Life on Mars in the 22nd century.