In Portal 2 the voice acting is obviously great, but then, it's not hard to do when you only have a few characters... What is harder and more impressive (imo) is when you have an rpg/sandbox game with hundreds of characters/npcs and manage to get them to sound right, which is something BioWare have been pulling off recently, as well as GTA4.
But a shout-out for an old game: The Neverhood
http://www.youtube.com/watch?v=kxCKc4v9nwA&feature=related
Not much actual dialogue, but the sound-design as a whole is fantastic for a 15-year old game.
But a shout-out for an old game: The Neverhood
http://www.youtube.com/watch?v=kxCKc4v9nwA&feature=related
Not much actual dialogue, but the sound-design as a whole is fantastic for a 15-year old game.