Halo vs Gran Tursmo which brand is stronger?

[Slimebeast]

It's no contest. Halo is bigger than GT nowadays.

Halo 3 will have sold 12 million lifetime. Halo 3: ODST is predicted as a 7-8 million selling game, same as GT5 who is predicted at 8 million.

Halo: Reach is probably a 15 million seller.