The rumors are true: id Software titles are coming to Steam. According to a press release from Valve, starting today you will be able to download titles from the Quake, Doom, HeXen, Woflenstein and (huzzah!) Commander Keen series.
More than 20 titles will be available; additionally, many of the franchises will be available as packages with a 10% discount for purchasing en masse. We've printed the full list after the break.