A new animated short from Overwatch called "Recall" offers the back story on the Winston character from Blizzard's upcoming multiplayer shooter. There are some details on what we see in an update on the Overwatch website:

A super-intelligent, genetically engineered gorilla, Winston is a brilliant scientist and champion for humanity's potential. After spending several years working as a scientist for Overwatch, Winston has gone into seclusion since its fall, cut off from the world he believes in, longing for the days of heroism to return. He wields impressive inventions on the battlefield—including a short-ranged Tesla Cannon, Jump Pack, and Portable Shield Projector. But his most powerful weapon can only be unleashed by embracing his animal nature.

Weapons & Abilities:

• Tesla Cannon: Winston’s weapon fires a short-range electric barrage for as long as he holds down the trigger.
• Jump Pack: Assisted by his energy pack, Winston lunges through the air, dealing significant damage and staggering nearby enemies when he lands.
• Barrier Projector: Winston’s barrier projector extends a bubble-shaped field that absorbs damage until it's destroyed. Allies protected by the barrier can return fire from within it.
• Primal Rage: Winston embraces his animal nature, significantly boosting his health and making him very difficult to kill, strengthening his melee attack, and allowing him to use his Jump Pack ability more frequently. While raging, Winston can only make melee and Jump Pack attacks.