Portal 1 + 2 Bundle, Left 4 Dead Bundle $1.48 Each, The Orange Box $2 (PC Digital Download)

Steam has select Valve Published Games (PC Digital Download Game) on sale from $0.99.
Available deals:

• Portal Series Games
  • Portal 1 $0.99
  • Portal 2 $0.99
  • Portal 1 + 2 $1.48
• Left 4 Dead Series Games
  • Left 4 Dead $0.99
  • Left 4 Dead 2 $0.99
  • Left 4 Dead Bundle $1.48
• The Orange Box $1.99
  • Includes:
    • Half-Life 2
    • Half-Life 2:Episode 1
    • Half-Life 2: Episode Two
    • Portal
    • Team Fortress 2