Hi! I've seen that you like a games with a good storyline. So, I'm going to present you one (if not the best) game with an awesome adult storyline!
This game is Planescape: Torment:

What's it about?
Basicly, Planescape is about a guy with no memories, who wokes up in morgue, in a city which is a place with portals to other worlds.
The game is putting us a question about a Nature of Man, and if that nature can be changed. Also, the main protagonist is immortal, and he is looking for a way, to become mortal again. (Pretty much)
Gameplay:
The game is old, and it looks like some kind of isometric RPG like baldur's gate. But the main difference is that in this game you've got much more dialogues and actuall roleplay, than in others. The atmosphere, characters, and whole storyline, in my opinion are just brilliant!
And also, it's easy too buy, and cheap. For example, on GOG: gog.com/gamecard/planescape_torment
Well, i think that's all ;p.
Bye! And, srry for my english
This game is Planescape: Torment:

What's it about?
Basicly, Planescape is about a guy with no memories, who wokes up in morgue, in a city which is a place with portals to other worlds.
The game is putting us a question about a Nature of Man, and if that nature can be changed. Also, the main protagonist is immortal, and he is looking for a way, to become mortal again. (Pretty much)
Gameplay:
The game is old, and it looks like some kind of isometric RPG like baldur's gate. But the main difference is that in this game you've got much more dialogues and actuall roleplay, than in others. The atmosphere, characters, and whole storyline, in my opinion are just brilliant!
And also, it's easy too buy, and cheap. For example, on GOG: gog.com/gamecard/planescape_torment
Well, i think that's all ;p.
Bye! And, srry for my english