This was the first open world and real-time combat RPG that i had ever played. When i thought of an RPG i though of games like Final Fantasy, but after playing this i felt like it was a revolutionary game. the sheer size of the game was amazing, and all the detail that went into the lore just blew my mind. I still enjoy playing this game even today.
Star Wars Knights of the Old Republic
Before playing this i had always been a star wars fan, but not really a fan of the star wars games. When i picked this one up i was blown away at how well done the game was. What drew me in the most was the fact that it had nothing to do with the star wars movies and it was its own completely independent amazing story, packed with loads of original star wars lore. Every couple years i will dig this game up and play through it again and it's always just as fun as the first time.
Halo Combat Evolved
I was never a fan of FPS games, i found them to get too tedious and repetitive after playing the crap out of games like Doom and Quake. But when this game came around i fell in love almost instantly. The game just looked brilliant for its time and the combat was fun and exciting. This game showed me that FPS games can have a decent story and great gameplay. I was probably 11 or 12 when this game came out and i still remember that creepy feeling i got when i first encountered the Flood, i loved it!
Elder Scrolls 5: Skyrim
This game was everything it was promised to be, and it is utterly beautiful. It is very rare these days for a game that gets a crazy amount of hype before its release to actually meet up to the expectations that the hype set on it, and this game is one of those that was worth every penny and then some. It definitely deserves its spot on my list as one of the best games ever.
The original Halo trilogy. The story was incredible, and the gameplay was never too repetitive, unlike other games in the genre. The story could have ended at 3, and while I don't have a problem with Halo 4, it certainly wasn't as good as its predecessors.
The Mass Effect trilogy. The heavy science fiction, coupled with the political and social implications where humanity is a new race in a galactic community was astounding. As well, the weight of each decision the player makes in one game and their impact on the story in the next, although not as branched out in the second game (let's be honest, email messages are not very satisfying), was a great mechanic.
And of course, Pokemon. I cannot stress enough how much this series means to me. I fondly remember Christmas after I turned five and opening a present with my first Gameboy color and Red version, and the following months of time clocked in it. The newer generation games definitely do not carry the same kind of attraction to me as the older ones did, what with the unoriginal creatures and very sad attempts at plot present in IV and V, and I still view Yellow as the best game of the series, with Crystal and Emerald tied as very close seconds.
Fallout 3 and New Vegas Really fun to play, very long play time if you do all the side missions, great graphics, overall just a really fun time.
The Elder Scrolls Series (Mostly Morrowind, Oblivion, and Skyrim) Really fun to play, I love to play in Medieval times where there are knights, bows, and with that little bit of fantasy thrown in with dragons, mythical creatures and such.
Mass Effect Series I don't really think I need to explain why :P
Uncharted Series Love the comedy in it, the "parkour" element is always fun to me, the gunplay is awesome, and I love the story and history behind it.
Assassin's Creed Series Basically the same reasons as the Uncharted series, but replace the gunplay, with the stealth mechanics.