Remember when PC game sales were just for the weekend? Lately sales have popped up that have spanned an entire week. We've got two more examples for you today:

One is Garry's Mod, the terrific sandbox game/app/toy that requires at least one Source-based game be installed on your PC in order for it to work. From now until September 21 you can buy Garry's Mod via Steam for just $4.99, a 50 percent decrease from it's already low price of $9.99. Garry's Mod got an update a few days ago that added 10 new Steam achievements to the game.

At GoG.com they have put the spotlight on the terrific 2004 FPS Painkiller. You can download the game now from them for $2 off their already low price. That sale ends at the end of the day Sunday.