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 the sequel, GemCraft lost chapter: Labyrinth, was released February 17, 2011, taking place at roughly the same time as the original game The original was released for iOS on April 14, 2011 by NTT Resonant.In GemCraft, players are given gems and may combine them to put in towers.