Inquisitor (2001)

From GW's website: "Inquisitor is a large scale narrative skirmish game using beautifully crafted 54mm models, and set in the dark world of the Imperium's most covert and mysterious agents. The book contains: Rules for Inquisitor, comprehensive armory and details of abilities and powers, extensive guidance for Gamesmasters and players, 15 fully detailed sample characters, ready-to-play scenario, and complete reference section, glossary and index for ease of play."

see the RPGG entry Inquisitor