For me its hands down metal gear solid 2 for ps2 i also have it for xbox

If im not mistaken its the best selling stealth game ever 7 million and the best selling metal gear game to date.

Halo: CE. Epic single player campaign, and challenging on Legendary.

Final Fantasy VIII. The story was just amazing and it had the best main character ever in it. Just an overall kick ass game.

Star Ocean Till End of Time: Directors Cut would follow it very closely. That game was just finominal as well. The plot twist was just insane.

Soul Calibur (DC).
Perfection in every way!

Lunar: Eternal Blue (Mega CD one, PS1 one is ok)
I love the characters and the story + good gameplay.

Harvest Moon 64
That game is still the best one of the series. Sure it had a few flaws, but it was so much fun.

Metal Gear Solid

The story the characters and the amazing voice acting that brought all of the elements together

This game made me experience some thing that cant be expressed in words

Smash Bros Brawl. As much as I hate getting my ass whooped in the game by saviorx and some other people, its a fun game.

FFX I loved the story & the characters!!!

Metal gear solid IV