Consider Treyarch's Call of Duty: Black Ops for Xbox 360 declassified. If you own a physical copy of the 2010 FPS, pop that sucker into your Xbox One and watch as backwards compatibility magic makes it run like new. If you've got a digital copy, just download it to your Xbox One hard drive and you'll likewise be good to go.
It's a bit of a surprise considering that Microsoft confirmed multi-disc title support for backwards compatibility just earlier this week. I would've expected a massive RPG like Blue Dragon or Mass Effect 2. Still, I will gladly take some good ol' shooty-shooty bang-bang and zombies mode.