Altar of Freedom is a grand-tactical miniatures wargame system for simulating the large battles of the American Civil War, focusing on army-level command and control rather than individual units. Players take on the roles of corps or army generals to coordinate their forces, with each miniature base representing an entire brigade. The system uses a turn-based, variable-duration turn clock driven by a unique initiative bidding system where players secretly bid points to activate their divisions. The game uses 6mm or 10mm figures, features flexible basing, and includes historical scenarios to resolve major battles in a single evening.