Anderson had previously been working at Interplay on Project V13, rumored to be the company's Fallout-themed MMO.
"It was a very hard decision to leave Project V13," said Anderson to Gamasutra. "I loved the project, and we spent so much time on it, and it was not an easy decision to make. But in talking with Brian, it made it a lot easier. We really clicked, and saw eye to eye on what we wanted to see happen to RPGs."
The unannounced RPG project is in the early stages, according to Anderson, who is serving as creative director of the development team.
"I want to get back to RPGs that are very story-driven and character-driven," added Anderson. "Personally, I've never gotten out of [single-player] RPGs. There was the short stint working on the MMO for the past year, but that was pretty much it. I've always been about RPGs and RPG design. Even before Interplay I was a big RPG player."
inXile was created by Interplay founder Brian Fargo in 2002. The company released The Bard's Tale (PC, PS2, Xbox) in 2004, and is planning to ship Heist (PC, PS3, Xbox 360) this summer.