Steam’s weekend deal is a dozy, featuring everything Half-Life for 66 percent off.
Also, the Valve Complete Pack is 10 percent off. Normally $99.99, you can get the full bit for $89.99.
Here’s the full thing: Counter-Strike, Team Fortress Classic, Day of Defeat, Deathmatch Classic, Half-Life: Opposing Force, Ricochet, Half-Life, Counter-Strike: Condition Zero, Half-Life: Blue Shift, Half-Life 2, Counter-Strike: Source, Half-Life: Source, Day of Defeat: Source, Half-Life 2: Deathmatch, Half-Life 2: Lost Coast, Half-Life Deathmatch: Source, Half-Life 2: Episode One, Portal, Half-Life 2: Episode Two, Team Fortress 2, Left 4 Dead.
Massive bunch of games, there. Hit this link for the rest.