Just found out about this game called Cradle: http://www.youtube.com/watch?v=LbaLPrxdeHw&

It looks like a gorgeous 3d adventure game running on the Unigine engine and to be released Spring with a Linux port following!

I gotta say, I'm liking what I see. High production values (developed by industry pros), a really interesting environment and a great sense of atmosphere like this game will have some emotion in it.