First edition box cover art:
OCS Game 4-06, first published in 1999, second edition published in 2008. Designer: David Friedrichs. 2 full-size maps, 2 countersheets (plus marker sheet), scale is 1 hex = 5 mi/8 km. The scope of the game covers 45 turns, from 5 March 1944 until 1 August 1944.
Comparing the two editions: The map and counters (except markers) are identical. The markers are the only real difference. The 1999 game had OCS v2.0 rules, whereas the second edition used version 4.0. Playing the first edition with the latest downloaded ruleset and either adjusting for the markers or using a set from another OCS title works fine.
Game Specific PDF's: