The
MDNA games are situated in a sunny Norrköping in Sweden. Although Carol Reed is a detective dealing with murders and abductions, the games are never scary, there's no shooting in them and they are very playable.
Furthermore there is
The Ugly Prince Duckling, which is nice, and
Ceville.
Edit: and of course there is the whole
Myst series. Rand Miller hates violence in games, so there is none in Myst.