Assuming I don't finish any more games this year (a huge assumption, I know), I beat 20 games total:
Opus Magnum
Blue Reflection
Middle Earth: Shadow of War
Bastion
Tiny Metal
Telltale Batman: Season 2 (RIP Telltale ?)
Assassin's Creed Origins
Surviving Mars
Destiny 2
God of War
Destiny 2: Curse of Osiris
Destiny 2: Warmind
Uncharted 4
Mario + Rabbids: Donkey Kong Adventure
Uncharted: Lost Legacy
Life Is Strange: Before the Storm
Spider-Man
Shadow of the Tomb Raider
Red Dead Redemption 2
Shadow of the Colossus
My most played platform by number of games was PC, with 55% (11 games):
But going by hours it was PS4, with 50% (186 hours):
If it weren't for RDR2 PC would have won both categories handily. That game alone accounted for 66 hours, and that's even with me doing almost no side content after about the halfway point of Chapter 3.
PS4 also wins for most hours per game, at 27:
A big part of that is RDR2, but even without that game PS4 would still win the category. The rest I believe is due mostly to the two Destiny expansions, which were pretty short and drag down the PC average.
I was expecting this year to be the year of the PC for me, but PS4 actually made gains as compared to last year, which I find interesting.
I ended the year with a backlog of 7 games, the same as what I started with, so at least I'm finish games as fast as I acquire them. And 6 of those 7 I got within the last 6 weeks, so really I was doing pretty well. I removed 28 games from my backlog throughout the course of the year. The reason that's more than the games I beat is because some games I take off once I realize I don't want to play them anymore, without actually finishing them. The games that earned that dubious honor are:
Tyranny - This was a good game that I just lost interest in before getting all the way through it. I never really played classic CRPGs, so I think going back to that genre puts me at a disadvantage.
Metro 2033 Redux - I should have known before I got this one, I was never able to get into the original Metro 2033 either. I want to like it, but for some reason I just don't.
Okami HD - I just wasn't having fun.
Styx: Shards of Darkness - Same as Okami.
Yooka-Laylee - Same. It just felt soulless.
Battlestar Galactica: Deadlock - I've read that the expansion really improves this game, so I may give it another shot at some point.
The Long Journey Home
Shadow Tactics: Blades of the Shogun - I was really enjoying this game, until I got to a level that just seemed way too overwhelming.
Dying Light - I loved the running around and hiding from zombies, but hated actually fighting them, which the game makes you do too much.
Valkyria Chronicles PC - I didn't even make it to the tank mission this time.
Into the Breach - This is a good one for playing when I have a little time to kill, but not one I'm probably ever going to just play through.
So that was my year in games.