2015 Backlog: Xbox One

Another year.  A bunch of games I didn't finish (or in some cases start).  Yes, it is another list post.  What games (well, there may be more depending on backwards compatibility and the Countdown sale) have I still not beaten?  Should I be getting nervous that I am approaching the under 1 TB mark?  I should have Gold through at least October, so there will be more games added next year.  This is just stuff on my Xbox One hard drive (and 2TB external) as of December 19, 2015.

- not played
* not beaten (and probably never will be)
^ Games with Gold (will eventually lose these)
(BC) Backwards compatible title

Xbox One:
- D4: Dark Dreams Don't Die
- Dance Central Spotlight
- How to Survive: Storm Warning ^
- Just Cause 2
- Knight Squad ^
- Lara Croft: Temple of Osiris
- Massive Chalice ^
- Metal Gear Solid V: Ground Zeroes ^
- Minecraft
- Never Alone
- Operation Flashpoint: Dragon Rising
-  Ori and the Blind Forest
- Pneuma ^
- So Many Me ^
- Stealth Inc 2: Game of Clones
- Stick it to the Man
- The Deer God ^
- The Swappeer
- Thief ^
- Valiant Hearts: The Great War ^
- Voice Commander
- World of Tanks
- Zombie Driver: Ultimate Edition

* Air Mech Arena
* Assassin's Creed 4: Black Flag
* Battle Islands
* Battleblock Theater (BC)
* Borderlands (BC)
* Braid (BC)
* Castle Crashers (BC)
* Castle Crashers Remastered
* Chariot ^
* Might and Magic Clash of Heroes (BC)
* Deux Ex: Human Revolution (BC)
* Dirt 3 (BC)
* Doritos Crash Course (BC)
* Forza 6
* Frozen Free Fall
* Gears of War (BC)
* Gears of War 2 (BC)
* Gears of War 3 (BC)
* Gears of War Judgement (BC)
* Gears of War Ultimate Edition
* Gems of War
* Halo Reach
* Halo Spartan Assault ^
* Halo Master Chief Collection
* Heavy Weapon (BC)
* Iron Brigade (BC)
* Life is Strange
* Limbo
* Motocross Madness (BC)
* Pier Solar
* Plants vs Zombies (BC)
* Pool Nation FX ^
* Power Star Golf
* Tom Clancy's Rainbow Six Vegas (BC)
* Rare Replay (other than Kameo and Viva Pinata)
* Rayman Legends ^
* Sacred Citadel (BC)
* Strider
* Strike Suit Zero ^
* Super Time Force ^
* The Incredible Van Helsing ^  (can't beat final boss)
*  The Witcher 3: Wild Hunt
* Toy Soldiers: Cold War (BC)
* Volgarr the Viking ^
* Warframe
* Worms Battleground ^
* Zoo Tycoon
* Onigiri