Warhammer 40,000: Mechanicus Omnissiah Edition includes the full game plus:

• The atmospheric soundtrack featuring the highly acclaimed music of Mechanicus
• The stunning digital artbook containing an array of new and previously unseen concept illustrations and art from the development of the game
• Enhance your close-quarters arsenal with the hard-hitting power of the Arc Scourge.
• NEW: Deus Ex Machanicus by Andy Chambers - A Warhammer 40,000 short story On the dead world of Naogeddon, mysterious tombs, missing explorators and deadly defenders cause trouble for the Adeptus Mechanicus. But the biggest danger might come from within

May the Omnissiah protect!