Sedan 1940" is a battalion and lower-level Operational wargame focused on the decisive action at Sedan led by Rommel in 1940, encircling the majority of the French army by driving through the Ardennes and surprising a contingent of less than stellar French divisions. The system focuses on combined arms, combat effects can vary depending on the units in a stack (also called a force). Units feature both a Primary Combat Value and a Secondary Combat Value representing different types of arms/weapons available to units, and advanced rules are available to further simulate radio issues with command and control.

Forces are activated by chit pull, activating whole divisions at a time. Each unit is allowed two basic actions or one special action. The sequence of play is unstructured, allowing movement, assaults, fire-combat and planned assaults to occur as chaotically as they did historically. Unit types range from armor, infantry, artillery, anti-tank/air, engineer, and motorized units. Units can be placed in Overwatch status allowing them to engage in Opportunity Fire using their Primary Combat Value.

Each day turn is approximately 2 hours while night turns are 4 hours for a total of 20 turns.