Portal 1 + 2 Bundle (PC Digital Download Game) $1.50, Left 4 Dead Bundle $1.50 & More

Steam has select Portal Games (PC Digital Download Game) on sale from $0.99.
Example deals:

• Portal 1 $0.99
• Portal 2 $0.99
• Portal 1 + 2 $1.48
• Left 4 Dead $0.99
• Left 4 Dead 2 $0.99
• Left 4 dead bundle $1.48
• Valve Complete Pack $10.60
  • Includes
    • 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