Imperium Battles is a “replacement” set of rules for Games Workshop’s Warhammer 40k, based on the GW-Milton Bradley collaboration Space Crusade. The authors write:
“Imperium Battles” is a tabletop game for 25mm sci-fi miniatures from the Warhammer 40,000/Mutant Chronicles and similar universes that we have developed, based on the Space Crusade rules, but expanding them to cover whole-table scenarios, outdoor terrain, vehicles, buildings, and many more types of figures and weapons. The simplicity of the Space Crusade rules is zealously protected – “no tapemeasures or results tables” is the motto, and fun and relaxing games are the order of the day. Consequently, hexes are used for location and movement (although sometimes squares are still used on particular board sections or terrain pieces), with these hexes largely being supplied by the excellent ‘Battlescape’ range of terrain accessories from Geo-Hex.