Titanfall has players fighting either on foot as free-running "pilots" or inside agile mech-style walkers called "Titans" as they work to complete team-based objectives. The game is multi-player only, but does feature a story.
Dark Souls II is a new action RPG with no direct story connection with the first Dark Souls game, other than being set in the same world. The story revolves around an undead character trying to find a cure for their curse.
Arma III is an open world, tactical shooter that takes place in the 2030s. You take the role of a U.S. Army soldier and must survive on your own after friendly forces are defeated in a failed NATO operation.
Transformers Prime: The Game takes place alongside the events of the second season of the Transformers: Prime cartoon series. It involves the Autobots and Decepticons battling over a mysterious meteor.