Oxygen Not Included [Official Site] is the space colony simulation game from Klei Entertainment that I'm pretty excited about and it's showing signs of life for a Linux port.
If you're unfamiliar with it, here's the trailer:
We always knew it would come to Linux, since Klei are very Linux-friendly, they even confirmed previously that a Linux version was on their todo list.
It's not much to go on right now, so take it with a pinch of salt, but NuSuey who runs the TuxDB website pointed out this change today. Essentially, it's showing that they've put up a Linux content depot on Steam, ready for an eventual release. As I said, it's not much, but it's a good sign that they're at least beginning to work on a Linux version.
I love every game I've played from Klei and I do love my colony building games, so I'm really quite hyped to give this one a go.