Call of Duty: Black Ops is on sale on Direct2Drive (D2D) for 25% off which makes it $44.95. However if you stack their 20% off coupon the game ends up being only $35.96. This is a hot deal because this game is hardly ever marked down. You could also pick up the new First Strike DLC pack coming out for about an extra $12 after the coupon.
The coupon code is: MARCHMADNESS
Call of Duty: Black Ops – $35.96
This game is also available on Steam for 25% off making the game $44.95.
I think the D2D version should be able to activate on Steam. I’m not 100% sure though. If I get confirmation I’ll update the post.
EDIT: I can confirm this activates on Steam!
Side note but this game just recently became the best selling game of all time in the US.