Knights of the Old Republic 2: The Sith Lords.

I can't see anything short of Planescape: Torment changing my mind.

And I posit that whosoever argues is, himself, the one who is "clowning".

Easily MGS.

Metal Gear Solid by far.

The Force Unleashed also has a really good story, but the gameplay is less than great.

The original God of War story was intriguing, but not very well explored.

Suikoden

Brothers in Arms

Planescape: Torment. By far the best videogame story ever.

There are also a few more games with masterpiece stories like: Deus Ex, Grim Fandango, Fallout 1 and 2, Neverwinter Nights 2: Mask of the Betrayer and Warcraft 3.

Almost definitely Metal Gear Solid.

Metal Gear Solid
Kingdom Hearts

I really enjoy them

MGS MGS MGS AND MGS!

I played MGS4 without any other game.

Yet i cried o.o you could see the characters had so much chemistry FO REAL!

*SPOILER!!*












When Otacon cried after Naomis death i was like DUDE I FEEL YOUR PAIN!











*Spoiler*


Then in the end when snake was.. going threw something ;D That made me cry as well and the ending and the last boss fight. To damn awesome... I HAD t oget MGS 1 - 2 - 3 so what other place then EBAY XD. Got it for like 25 euros. I got a PS2 but i dont need it since i have a 60 GB ps3 ( well now i put in 320 GB XD ).

Anyway almost completed MGS2. (Wow its pretty cool actually, 1 was pwnage ).

Anyway short answer : MGS!

MGS series by far.

Mass Effect

The Force Unleashed