EDIT 11/27/18:
Yes, I did nominate Kingdom Come: Deliverance as my Game of the Year for the Steam awards.

ORIGINAL REVIEW:
This game is already my Game of the Year for 2018, I don't see how it's possible that any games releasing this year can even come close to being as good as KC:D is.

This is the first PC game to ever get sword fighting right. Morrowind tried, but the result was terrible, that's why The Elder Scrolls games never tried tactical dynamic sword fighting mechanics again. So the combat is incredibly satisfying, nailing the balance between player skill and RPG-based progression, so you as a player actually get better along with your character, whose stats improve, making it easier as you get better, which results in the end-game making you feel like a real swords master.

Although there are numerous small bugs, I haven't encountered any game-breaking ones yet (although I've read there are some, knock on wood) at 90 hours in, the game appears to be quite stable, as I also have yet to encounter any Crashes-To-Desktop. This makes me firmly believe that most such reports are the result of user error (things like not having up-to-date graphics drivers, unoptimized systems, etc). This is in contrast to the Bethesda Open-world RPGs (Elder Scrolls and Fallouts) where even today CTDs are fairly common. So all the negative reviews based on bugs seem radically unfair considering that the Beth RPGs (even though Fallout 4 isn't an RPG any more than Far Cry is) had far more on launch and seemed to get a pass for it.

The other common reason for negative reviews that must be addressed is people saying that the story is unfinished, with some people claiming that story content was cut in order to fleece you by adding it back in as DLC. That is completely laughable, and comes from people incapable of reading before they begin to type. Story-wise, what you are getting is actually 2 games in one. The Kingdom Come series has been planned since Day 1 to be a Trilogy. However, they raised enough money from Kickstarter and further investment to significantly expand the story and scope of the game, adding in far more additional content in the form of side-quests and a larger, more densely filled in base map. Deliverance is really Part 1 and Part 2 of the Trilogy story, so it does end on a cliff-hanger, as was always intended. This game will have a sequel, (that will also be significantly expanded upon from the original idea) due to the overwhelming success of this game. That was the way it was intended.

The best part about this game is the incredible inticasy and attention to detail paid to nearly every area of the game. That's most obvious from gameplay videos and screenshots alone that its the most graphically beautiful RPG ever released to date, however it goes far beyond that, with exceptional quality of voice acting, well-writen dialog, mostly interesting side-quests, and a very engaging main story, even if the premise of the start of the game is cliche, the execution of it is anything but, with the main character completely sucking at everything he does. Just like an Elder Scrolls game, you get better at things by actually doing them, and the implementation feels wonderfully gratifying. Just like in real life, unless you're a master swordsman, taking on 2 or 3 people in melee combat you'll wind up dead. It all feels very real, and is the most immersive non-VR game I've played. The game world is oozing with history as well, and in many many cases the developers have written articles to read in-game to expand upon that history for added context, so you'll understand the thoughts, feelings, and actions of the NPCs and your own character, and have backstory of the events unfolding around you. The game teaches you about all the many aspects of life at the turn of the 15th century in Bohemia, and then shows you it and lets you immerse yourself in it as well. They absolutely nailed that goal.

In short, Kingdom Come: Deliverance is easily the best game to release on PC since the Witcher 3, and although the environment couldn't be different (dark fantasy versus realistic dark historical fiction), Warhorse is obviously and successfully following in the path that CDPR laid down, while adding improvements and their own originality wherever it makes sense to do so.

My only real gripes are that after an NPC no longer has any quest or story functionality left, they essentially ignore you and revert back to kind of default state with their dialog, or don't allow any further interaction at all. This signicantly damages the feeling of you being a part of living world. If only they had done more with NPCs interactions, then I wouldn't have any serious complaints at all about this game. Oh well, I guess nothing can be perfect.