You get to be Connor Kenway, who is half-British and half-Native American, in Boston and other colonies during the American Revolutionary War, and also the role of Desmond, a descendant of Connor's who lives over 200 years after him.
Along with many returning elements that have been a staple of the Assassin's Creed franchise like free-running, there are also new elements like tree-climbing, cliff-scaling, running assassinations, sliding under objects, taking cover, jumping through windows into interior spaces during chases, and a revamped combat system.
There is a free running mode, combat and Naval Warfare areas to explore.
But the hunting mode plays a big part of Assassin Creed III game, wildlife including elk, wolves, and deer. You're rewarded during your hunt based on how quickly and efficiently you dispatch with your target. Connor will be able to use eagle sense to find his prey as well as his bow of course.