The Doomsday Project is a sub-series using the Operational Scale System (or OSS) and the game on the Battle for Germany in 1985 will be the first game of the Doomsday Project and the third game in the OSS family. 5 x 11" full color map Five dual-side printed countersheet (1,170 400 9/16" counters) One 48-page Battle for Germany rules booklet One 40-page Battle for.