I thought Baldur's Gate was pretty serious in tone. It was also somewhat frightening if you're new to D&D and didn't roll your character good, those gibblerings scared the crap out of me when I was a kid and wiped my party. (Then again, I was a kid).
Wasteland 2 isn't too 'serious' as in it's pretty hilarious with some of the concepts that it brings up with certain factions, and the dialogue. I mean, there's serious tones, but it's not over-the-top on either side.
But I'd like for some of the stuff to have a more serious tone, especially now that they are voice acting the majority of the game.
