GunZ: The Duel (Korean: 건즈 온라인), or simply GunZ, is an online third-person shooting game, created by South Korean-based MAIET Entertainment.

It is free-to-play, with a microtransaction business model for purchasing premium in-game items. The game allows players to perform exaggerated, gravity-defying action moves, including wall running, stunning, tumbling, and blocking bullets with swords, in the style of action films and anime.