ALERT Lexicanum is improving!. Warhammer 40K: Mechanicus is different – a turn-based tactics game built on fiction so weird it could sit in the dialogue boxes of Torment: Tides of Numenera. I didn't know much of anything about the Adeptus Mecha Offer ends in -50%. Warhammer 40,000: Mechanicus Review – Praise The Omnissiah! Space Marines were first introduced in Warhammer 40,000: Rogue Trader (1987) by Rick Priestley, which was the first edition of the tabletop game.. I had the chance to sit down with the Senior Producer (Andrew) of the upcoming game, Warhammer 40,000: Mechanicus. "There is no constancy in flesh, only decay."