It's spending $170 million (RMB 1.1 billion), becoming Webzen's largest shareholder in the process.
The move is part of Ourpalm's global expansion, which saw it investing $2.3 million in Australian-floated publisher Animoca Brands.
It's also invested extensively in Chinese content creators.
Focused on PC MMOGs, Webzen is now moving into mobile, although its recent performance hasn't been sparkling.
It's best known for MMORPG Soul of the Ultimate Nation and FPS Huxley.