Mu Online

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MU Online
Developer(s)	Webzen
Publisher(s)	Webzen (MU Online Korea & Global MU Online), ZhaoUC (China version), Webzen Japan (Japan version), Asiasoft (SEA version)
Designer(s)	Webzen's MU Studio
Platform(s)	Microsoft Windows
Release	November, 2001[1] 28 June 2022 (latest patch)
Genre(s)	MMORPG
Mode(s)	MMO

MU Online (Korean: 뮤 온라인) is an Isometric medieval fantasy MMORPG, produced by Webzen, a Korean gaming company. It was introduced in 2001, and is still being supported and updated in 2024.