Well I can only vote for 2015 games that I've actually played, so it comes down to The Order 1886 or Rocket League.
I think I must give it to Rocket League.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix