Short answer
Open the Omarchy menu with Super + Space. Choose Install > Gaming > Battle.net.
Steps
- Open the Omarchy menu with Super + Space.
- Choose Install > Gaming > Battle.net.
It installs standalone under GE-Proton for titles like Diablo, StarCraft and World of Warcraft, with no Steam, Lutris or Heroic needed. [omarchy.org]
Source
From the official Omarchy manual, checked 2026-10-19. Battle.net is not a package in the Omarchy repo, so it has no app page here; for repo apps use the apps list.