Case left Ion Storm in January 2001 to join Romero at his new company, Monkeystone Games, which was created in August 2001. Monkeystone was formed out of a desire to move away from creating PC games due to their budget and lengthy development cycles, allowing Romero to explore the concept of mobile games that had first interested him in 1999. Case worked as a producer for Monkeystone's first game, "Hyperspace Delivery Boy!", and also created the music and sound effects. She also was credited on titles like Monkeystone's "Red Faction" port for the N-Gage. After leaving Monkeystone Games, Case became a senior project manager for Warner Bros. Online's mobile group.