The Grapnel Gun is one of Batman's main gadgets in Batman: Arkham Origins
It shoots a Grappling Hook - a claw shaped projectile on a retractable high-tensile cord, which grabs itself onto a solid surface. The cord will then pull Batman, allowing Batman to easily get high up
Tips[edit]
Look for Gargoyles on roofs of tall buildings throughout Gotham City. A Gargoyle is usually a good place to aim the Grapnel Gun at.