66% off. For instance, you can snag the Half-Life Complete Pack, which includes both Half-Life games, every Half-Life expansion, both Half Life 2 episodes, Team Fortress Classic and Half-Life 2: Deathmatch for only $16.99. If you'd rather pick up only a few individual pieces, most of them can be had for only a few dollars.
Beyond the Half-Life games, the Valve Complete Pack – usually $99.99 – has been knocked down to $89.99. If you've missed out on Valve's brand of goodness over the last decade, this pack will bring you up to speed. Half-Life, Team Fortress 2, Portal, Left 4 Dead: You name it, it's in there. Use that $10 for a bag of delicious Arby's, and you've got a solid weekend of gaming bliss.