Crimson Fields, Crimson Skies mod for Blitzkrieg

CFCS is at it's heart a realism mod, but there are of course some compromises for gameplay reasons. It covers the traditional Second World War period, that is 1939 to 1945, the same as the original game. It does expand this to cover the Pacific, China-India-Burma and Far Eastern theatres, as well as looking at all theatres and campaigns in more detail. For example, the Allied Campaign is now split into separate Commonwealth and US Campaigns, with the Commonwealth Campaign featuring forces from the UK, Canada, Australia, New Zealand, South Africa and British India, as well as Free Polish and Free French forces (which also feature in the US Campaign). The German Campaign is expanded into an Axis Campaign, featuring forces from Germany, Italy, Romania, Hungary and Slovakia, and so forth. The campaigns themselves are much longer, with 18 to 20 Chapters, with diverse locales, including new flora, objects and buildings to accurately portray those locations. It also features new sound effects, new weapon types and gameplay concepts. There are also addons that cover the Spanish Civil War (1936-1939) and Korean War (1950-1953), as well as "What-if" 1945 chapters covering a continued war between the Allies, Germany and the USSR with interest new weapons and equipment, as well as a theoretical conflict between the West and the USSR.

For map makers, it also includes a substantial toolkit of new units, objects, buildings, and so forth to create almost any conceivable scenario from the 2nd World War.