14 - MW2 (40-50 million $)
13 - GOW 3 (44 million)
12 - Killzone 2 (45 million)
11 - FF XII (48 million)
10 - APB (50 million)
10 - L.A. Noire (50 million)
8 - Halo 3 (55 million)
7 - MGS 4 (60 million)
7 - Too Human (60 million)
5 - GT5 (60 - 80 million)
4 - Shenmue (70 million)
3 - FF XIII (70 - 75 million)
1 - Red Dead Redemption (100 million)
1 - GTA 4 (100 million)
Of course, to be taken with a grain of salt.
http://de.ign.com/articles/news/6758/Die-teuersten-Spiele-aller-Zeiten
Looking forward to: FF Versus XIII / LBP2 / The Last Guardian / Yakuza 4 / ICO Collection