Day 7 of the Direct2Drive 30 Days of Deals (Deal$). The same sale is going on at IGN PC Store.
Today’s deal is on the Max Payne Collection which comes with Max Payne and Max Payne 2.
IGN PC store also has the game for $3.75 also but there’s no promotion codes available at this time.
EDIT: D2D UK also has the Max Payne collection on sale. It’s priced £2.45.