Can you tell me a game with a good storyline ?

I'd say Alan Wake is pretty nice, and the writings are awesome too.

And people actually mention any Final Fantasy game here... the most incoherent collection of words/turds that even an illiterate wouldn't consider to be a story.
Tasteless wannabe gamers.

Plenty of other actual good recommendations here though, but this... Extremely misleading.

The Last Remnant looks like would have a decent storyline, i never played it through

Aura: Fate of the Ages

Dear Esther

If you enjoyed Mass Effect, you should at least give Dragon Age a try. They're both my favourite games and they're both RPGs, very similar as well. Main difference between both is the setting and the story.

deus ex. the witcher. bioshock. i really like dishonored story but some people dont.

a game with the most best storyline ever is called "twilight: the game"

Metro 2033 and Last Light, for FPS's. Super immersive, really cool world. I love them.

To the Moon--not much of a game, but one of the most emotional and interesting stories I've experienced. It's about 4 hours long, 3 if you're quick, and you want to play it in one sitting if possible.

Batman Arkham series, easy enough to imagine why.

Brutal Legend was pretty awesome if you like metal. Just a real good time.

Lord of the Rings: War in the North isn't an incredible story, but for a huge LOTR fan, it was pretty great.

Mafia the city of lost heaven

I enjoyed Batman: Arkham City you may also

I believe someone else had a thread pretty much identical to this one, you can search the forums for similar things and you'll probably find other great suggestions.

To The Moon, best game i've ever played.

Assassin's Creed Series, Fahrenheit, Heavy Rain, Alan Wake, Bioshock, The Elder Scroll's, The Last of Us, Portal, Red Dead Redemption, for example

I really enjoyed the storylines in The Darkness and Deus Ex:HR (if you hack enough computers to get background info in-game).

Deus Ex: Human Revolution.

Also, Assassin's Creed II & Brotherhood.