Shock Force - Marines is the first of several planned expansions of the Combat Mission contemporary warfare setting.

This, the first Module, adds a significant number of new formations, units, weapons, equipment and vehicles for both the US and Syrian sides, as well as brand new missions, maps and a campaign. General game engine improvements (such as TacAI changes, tweaking cover values and so on) are included as well, although they are also available to all Shock Force customers.  This ensures that everybody plays by the same rules and experiences the same basic gameplay.