The first comparison that came to mind was that Terminator Salvation felt like it was based around the Gears of War model. The game is a 3rd person shooter, with the ol' regenerative health, limited weapon capacity, and cover system to utilize in your attacks and defense.
You take the role of John Connor, two years before the events of the movie by the same name, and you do so in a ravaged Los Angeles. The game wastes no time before throwing you in front of Hunter/Killers, Wasps (small flying drones, not unlike Halo's Sentinels), and a T600 Terminator that wants to ventilate your body courtesy of a minigun.
