Left 4 Dead 2 highlights the digital deals this weekend, no doubt spurned by the recent DLC. A good deal for those of you that may have missed the original as well is a two pack of L4D and L4D2 for $33 bucks.
Steam
Left 4 Dead 2 - $20.09 (33% Off)
Left 4 Dead 2 Four Pack - $60.29 (33% Off)
Left 4 Dead + Left 4 Dead 2 - $33.49 (33% Off)
Trine - $5 (75% Off)
Good Old Games
Descent + Descent 2 - $4.19 (50% Off)
Descent 3 + Expansion - $4.19 (50% Off)
Freespace + Expansion - $4.19 (50% Off)
Freespace 2 - $4.19 (50% Off)
Impulse
THQ Ultimate Bundle - $99.99 (71% Off) [Includes multiple co-op titles]
Games for Windows
Resident Evil 5 - $24.99 (50% Off)