Sorry, let me clarify: everything even remotely mainstream is blood and gore. Or, if it's not totally blood and gore, it's been dumbed down significantly to appeal to the masses.
Good list of games, but...
- Sam and Max is cheating because it was conceived during the Golden Age. (One of my all-time favorites).
- Plants vs. Zombies is great game, but doesn't do much to broaden my horizons. And it definitely has a focus on fighting. That said, one of my all-time favorite games is the original XCOM. You really had to think hard to play that game. Had great atmosphere as well.
- Machinarium...okay, it's a great game and currently installed on my machine.
- Minecraft: also a good game that's doing something innovative.
However! None of these games (as far as I know) appeal to a big mainstream audience. I really doubt we'll see Zynga, Blizzard or EA doing anything like these games in the near future. Maybe EA would.
But I'm glad to know that I'm not in a camp of one. :)