How I feel when I am going to try the "Take no damage, purchase no upgrades, perform no takedowns and utilize no Quickfire gadgets" Challenge : r/BatmanArkham
Batman Arkham Origins: Takedowns - Orcz.com, The Video Games Wiki
Batman: Arkham City Game Guide: List of Unlockable Moves, Attacks and Combos - Video Games, Wikis, Cheats, Walkthroughs, Reviews, News & Videos
Screenshot :: Worst Nightmare 12, Deadshot bank mission Part 2. 12 different takedowns, 18 enemies total including Deadshot. Completed unseen. - Steam Community
Obtaining the Glue Gel - Batman: Arkham Origins Blackgate Wiki Guide - IGN