Bethesda 40th anniversary sale knocks 50% off Doom: The Dark Ages - Revelations just a month after launch

Bethesda is currently running a 40th anniversary sale on Steam until August 13, just in time for this year's QuakeCon. The sale covers the studio's entire catalogue, including the offerings of subsidiaries id and Arkane. That's where the real heat is, if you ask me: The recently-released Doom: The D…