Game Awards 2015 Nominees listed

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Game Of The Year
The Witcher 3

Developer Of The Year
Nintendo

Best Independent Game
Rocket League

Best Narrative
The Witcher 3

Best Score/Soundtrack
The Witcher 3

Best Performance
Mark Hamill as The Joker (Batman: Arkham Knight)

Best Shooter
Destiny: TTK

Best Action/Adventure
Batman: Arkham Knight

Best RPG
The Witcher 3

Best Fighting Game
Mortal Kombat X

Best Family Game
Super Mario Maker

Best Sports
Rocket League

Best Multiplayer
Destiny: TTK

Best Art Direction
Batman: Arkham Knight

Most Anticipated Game
Quantum Break

There are my picks from said list.  In a lot of categories though I did only play the one game available, so default win etc.