Obsidian Entertainment and Paradox Interactive used some of their time at E3 to announce the first expansion for their RPG, Pillars of Eternity. The expansion is called The White March, Part 1, and is the first of a two part expansion. The White March will raise the level cap, add new multi-class abilities, new companions including the Rogue and Monk, and introduces a new story line. The expansion was initially a pledge add-on for certain backers in the wildly successful Kickstarter campaign which funded the project. There is yet no release date for the expansion, but there is a trailer which you'll find below.
Pillars of Eternity is available on PC, Mac, and Linux. Details on how to buy and pricing for the different editions are available on the official site.