Halo 5 will outsell Uncharted 4.

[Baryonyx]

The origin XB didn't have any games, like Max 200 i think, and it reached around 20 mill units sold in it's lifetime. Ofc more people bought Halo since it was their coolest option at the time. Don't forget to add that as well.

PS2 had over 3000 games, probably 6000 games if we include japan. With the variety of games will attract different variations of gamers. Therefore it's hard for 1 game to get 10 million sold, cuz they got so many options to pick from.

if the XB had as many options when it came to libary, i don't think it would have sold as much as it has.