You are right about that. I played Disgaea 1-3 and 5. But 7th gen hates me and all my consoles from that gen are broken, so a lot of unplayed games. And since 7th gen insists on staying as expensive as a Wii U I upgraded.

Pokemon X/Y

If there ever was a game that needed to count play-time, it is 'Rollercoaster Tycoon 2'. It's a shame I will never know, but I have undoubtedly put many thousands of hours into it, which likely makes it my most ever played game. There's really just two other contenders. I still have many of my saved-games from the very beginning, dozens and dozens of them and there's more added to that list on a fairly regular basis though certain parks alone take hundreds of hours to build.

A game which I played so regularly for such a long time has got to be good, and it is placed high on the list, because it is. The player is unlimited, and you can build anything you can imagine. The only downside is that the world didn't stand still, and advancements have been made in real life in ride-technology in the last one-and-a-half decade that isn't possible to replicate in the game without some doses of imagination. It doesn't spoil the fun however.

Even with those thousands, maybe even ten-thousand, of hours of playtime, I barely completed a single scenario. They're not interesting; the sandbox-mode, and the limitless designing possibilities that come with it is what it's all about, and I've gotten very good at it. Even without the use of the many available user-created content and hacks. In fact, what you see in the screenshot, is mine.

So there's my christmas game. Next up:

#6
While the previous two games in this series, the quintessential one in it's genre, were using a number in the thousands, this one just used a single-digit number in it's name. It was also the last game before the series turned bad (like, there were almost riots in the streets bad), and interestingly so the publisher hasn't dared to use the number "5" in any sequel yet. There could very well be a connection.

Forgot to mention that this is correct!

8 is really easy guys.

8 Hint: Circles and zombies.
Hint 2: https://www.youtube.com/watch?v=NnbouQIFGZI

Hint 3: Popular multiplayer game, I preferred shotgun and SMG in this one.

Hint 4: 1st game in a 3 part series now, possibly the most popular series.

7 Hint: This game let you be the main character of the series and an alien, unlike its predecessor.

Hint 2: FPS with interesting jumping and blast physics. Also interesting sword lunge physics.

...You honestly hold Smash 64 in higher regard than Melee?

#7 - What happens when you make a zombie game without zombies? You get a masterpiece.

Yes!

CoD: Black Ops? I don't know.

Yes. The vid I linked even has it in the description lol.