Obsidian Entertainment, the developer behind Fallout: New Vegas, Alpha Protocol, Pillars of Eternity and other role-playing games, is joining Microsoft’s stable of studios. Microsoft announced its intention to acquire Obsidian today at its X018 event in Mexico City. Microsoft has been on a studio spending spree this year. At E3 2018, Xbox chief Phil Spencer announced that the company had acquired four studios: Ninja Theory (Hellblade, DmC), Playground Games (Forza Horizon), Undead Labs (State of Decay) and Compulsion Games (Contrast, We Happy Few). Microsoft also established a new internal studio, The Initiative, led by the former studio head at Crystal Dynamics. The addition of Obsidian will bring some valuable RPG know-how to Microsoft’s studio lineup. It’s unclear how the acquisition will affect Obsidian’s untitled RPG, which is being led by Fallout co-creators Tim Cain and Leonard Boyarsky and is in development at Take-Two’s Private Division label. Obsidian Entertainment was founded in 2003 by former members of Black Isle Studios (Baldur’s Gate, Icewind Dale). The studio is located in Irvine, California.