There are few direct analogues for Far Cry 2, as it truly is an open-world shooter. It's a stark contrast to Infinity Ward's unrelentingly linear Call of Duty games, and offers more freedom than what Crytek wound up delivering post-Far Cry with its pseudo-linear Crysis franchise. Perhaps GSC Game World's S.T.A.L.K.E.R.: Shadow of Chernobyl is the best comparison, though even that game differs, because where it leaned more toward role-playing elements, Far Cry 2 is almost all about shooting. There are still ways to upgrade your character, but the focus here is most definitely on action.