I like the series, generally. But, as you kind of implied in the OP (and as others have mentioned also applies to Far Cry), from a business perspective, the idea us great. They don't have to think about story progressing through multiple sequels. They have tons of already existing stories and places to base games around. They don't have as much pressure to evolve various parts of the game, because the change in setting makes each game unique. There are lots of other, similar pros (from the dev/pub perspective) as well.








