My favorite game of this year is
Tribes Ascend.
Not only is it one of the first F2P titles, that offered a system that wasn#t designed around Pay 2 Win, but HiRez Studios made the impossible possible and offered a new Tribes game that wasn't hated by the veterans and still easy enough to get into for newcomers like me.
And in an era, dominated by shooters like Call of Duty and Battlefield the feeling of the game is just so unique and different that I cannot comprehend how this game hasn't gotten more attention. Adding a layer of verticality to a shooter sounds so simple but is oh so genius.
Also I really love how different Tribes feels even when comparing gameplay without the jetpacks and insane speeds. Capture the flag is the predominant mode in Tribes, the first thing someone new like me notices, and while CTF has been done before, the additional layer of having base defenses, both AI controlled and player made is very fun. Not only that but another layer within this gameplay is a generator located within the enemy base which, when destroyed, disables most defenses for the enemy team. This makes it possible that a single game has three layers of gameplay. Defending the flag, attacking the enemy base, and grabbing the flag/getting it home. Every single role is fun and different enough from each other.
And all this combined with being one of the last recent "skill based" shooter (aka "You don't die within 2 seconds if someone sees you" aka "you have at least the chance to fight back and win by being better") makes this my current
game of the year.