This is just an idea. WOW has fishing could Destiny have hunting? A stealth based hunting for food animals. There must be some wild life that's survived other than dragons. Other races like the Fallen may have bought their own animals as pets or living food supplies. Love to see what the Fallen had evolved to hunt not to mention the Cabal. Make it a sniper based side game as any animals still around would know to run from us. Rewards could be camo based or marksman badges.