The basic Infinity Ward groundwork from previous games remains intact here, and it's once again iterated upon for this release. However, there have also been some curious changes to the series' underlying engine that directly impact how each console version looks and plays. The branching pathways of the largely character-driven story, its new RTS-style 'Strike Force� missions, and the move away from a killstreak-focused multiplayer each stand as bold changes in themselves. Treyarch's Black Ops 2 is a bit of an enigma in the canon of Call of Duty titles.
