Guilty Gear

The story is set in a world where magic has replaced almost every aspect of modern-day technology. But through its dire consequences leading up to the creation of a race of magic-infused creatures known as "Gears", the world has nearly become a post-apocalyptic environment due to Crusades' effects on the world. Although the world is still recovering, much work is still needed to be done and the mysteries behind the creation of the gears have yet to be resolved. (Source: Wikipedia)