Holy Shit I have no idea where to start.
Oh wait yeah I do.
Fallout New Vegas
While buggy, this game is a fucking masterpiece. It built upon the below average game Fallout 3 in every aspect, giving Characters dimensions, a more Immersive Environment, Crafting, Hardcore Mode, better quests, vaults, gameplay, EVERYTHING. It finally brought the series back to something similar to what it started as story-wise, and enviornment-wise. The ending wasn't shitty and gave a sense of realism with he inability to make a truly right choice (Fallout 3 amirite?). I could go on for hours about the merits of this game, but I will stop. This game, while not the greatest game is one of my favorites.
Fallout
The starting point of a series that, in my opinion, is still the best in the series. A great ending, a great narrative, and really good gameplay. There are so few things they needed to improve on this game. One of my favorites.
Shadow of the Colossus
Holy shit this game is fucking beautiful. Honestly I don't know what I could say about it that hasn't been said by so many people before me. This game is charming, dark, intelligent, and almost everything in between. If you haven't played this, by god, get your hands on this game. It is one of the best games ever made.
LoZ: OoC and Half-Life (1+2)
These games, compared to today's standards, aren't that great. What they did, though, was forge the way for common adventure games and FPSs respectively for years to come. Combined with this and Nostalgia these are some of the best games ever made.
Binding of Issac
A nod to old adventure games. There is little this doesn't provide. What I view as an interesting social commentary, challenging gameplay, good controls and level design, and most of all, this game is fun. Definitely one of my favorites.
Swords and Sworcery EP
A unique and challenging title that had me thinking for a long time on what might have been nothing. My favorite narrative game.
I'm not even going to delve into things like Pokémon and Fire Emblem and so many other games that I should have written about but I didn't.
P.S. +5 points if you have played all of these games (or bottlecaps if that's how you roll).
P.S.S. I will explain why I like these games in more detail if what I said fails to sway your opinions.