Career
Castle co-founded Westwood Studios with Brett Sperry in 1985. Castle has multiple credits on Westwood games, including executive producer, technical director, and art director for the 1997 video game Blade Runner. Castle is also known for his contributions to multiple Command & Conquer games.
Westwood was acquired by EA in 1998, and Castle continued on with EA in a number of executive and creative roles. He was executive producer of Boom Blox and Boom Blox Bash Party, developed for the Wii in a collaboration with Steven Spielberg. From 2003 to June 2009, Castle was Vice President of Creative Development at the Los Angeles studio of Electronic Arts (EA Los Angeles).
On July 15, 2009, Castle joined InstantAction as the new CEO of GarageGames. After InstantAction was shut down in November 2010, Castle went on to become Senior Advisor for Premium FanPage in January 2011, and later joined Zynga as VP of Studios.
Castle took a detour out of the video gaming industry to serve as Chief Strategy Officer for Shufflemaster (which became SHFL entertainment) in late 2011. He returned to video games as Creative Director for Kixeye's War Commander: Rogue Assault which launched worldwide in 2016.
On March 9, 2017, Castle became the head of the newly formed Amazon Game Studios Seattle.