For all you Steam users out there, a sale started on August 4th going on to the 7th on a number of different games from both iD and Bethesda. If you're wondering why this is relevant consider that all the classic Dooms, Heretic, Hexen 1 and 2 (and the Deathkings expansion for Hexen 1), and Doom 3 and its expansion are all on sale for about 25% off. So if you're missing any of these iwads/games, now's your chance to get them (especially if you somehow missed the iD Super Pack summer sale earlier this year).

Although the sale is on Day 2 at this point, there's still plenty of time to get the games you want.