Steam has Valve Complete Pack $6.99

[root]

https://store.steampowered.com/bundle/232/Valve_Complete_Pack/

20+ games in $6.99

• Counter-Strike: Condition Zero
• Counter-Strike: Global Offensive
• Team Fortress 2
• Dota 2
• Day of Defeat: Source
• Team Fortress Classic
• Day of Defeat
• Deathmatch Classic
• Half-Life: Opposing Force
• Ricochet
• Half-Life
• Half-Life: Blue Shift
• Half-Life 2
• Counter-Strike: Source
• Half-Life 1: Source
• Half-Life 2: Episode One
• Half-Life 2: Episode Two
• Portal
• Portal 2
• Left 4 Dead
• Left 4 Dead 2
• The Lab

 

[Ghost]

TF / TF2, CS, and Portal 1/2
Any single one of these games alone makes this deal worth it!