High Quality Content by WIKIPEDIA articles! GemCraft is a tower defense flash game created by Game In A Bottle, originally released June 26, 2008. A prequel, GemCraft Chapter 0: Gem of Eternity, was released April 16, 2009, and a sequel, GemCraft lost chapter: Labyrinth, was released February 17, 2011. The original was released for iOS on April 14, 2011 by NTT Resonant.