Full bestiary, ALL armor and equipment, including the magic ring, both health and magic elixir, MAX experience, and all disguises. (Obviously) Now. What the hell am I missing, or does somebody need to fix my achievements?
After several very frustrating attempts of trying to build about 20 towers and lv. 6 gems, I found it MUCH easier to simply pool everything into a single god-tier gem and let that nuke him as he pathed the level. Only needed one banish on my first attempt at it.
 "Desktop TD Pro"){kind=icon}
 "Isoball 2"){kind=icon}
 "Infectonator!"){kind=icon}
 "Hero's Arms"){kind=icon}
 "GemCraft"){kind=icon}