Trine 3: The Artifacts of Power is out today. It's been in Steam Early Access for awhile now, and is finally available as a full-fledged release.
The game, which spent a few months as a Steam Early Access title, is now available for gamers who haven't already picked it up for a 10% discount, at least on the PC. Mac and Linux versions are planned for release later this year.
Trine 3 is the first title in the series to feature full 3D gameplay, as the trailer below should show. It's a major overhaul over the previous games, which were strictly 2D.
The game supports online and local co-op multiplayer for up to three players.
If you enjoyed the first two Trine games, Trine 3 should be right up your alley.