Batman: Arkham - Ranking EVERY Villain Worst To Best

The Abramovici brothers, known as Hammer and Sickle for their respective weapons of choice, were once conjoined twins, but were separated at the arm by the Joker and brought to Gotham to work as his henchmen.

Batman first encounters Mr. Hammer at the Joker's hideout, the abandoned Sionis Steel Mill. He appears as little more than an abnormally large one-armed minion, but when his brother, Sickle, later shows up as one of Penguin's goons, you get the sense that there's more to them than it seem.

Not much more, mind you, but still, it really adds to Joker's cruelty seeing what they have become under his ownership. What's more, a hidden late-game scene shows the two brothers sitting stump-to-stump and expressing their mutual desire to be rejoined. Quite a bittersweet little end to their otherwise one-dimensional story.