Standard unmodded HoloCure, straight from the official release.
Action / Roguelike / Arcade · 2023 · ~250 MB · Free / Fan Game
That One Thing
Instead of cosmetic reskins, every one of its 47 idols has an entirely bespoke primary weapon, three playstyle-defining passive skills, and a screen-clearing special attack.
The original, pure single-player HoloCure experience directly from official distributions without modifications.
Checking…
Published by the game's own developers.

Online co-op for HoloCure over a shared PlayBound Connect network. No Steam, no port forwarding, no Hamachi to set up yourself. Experimental — expect occasional crashes.
ActionRoguelikeArcadeCo-op
Looking for the base game?
HoloCure - Save the Fans! has an overview, reviews, guides, and discussions covering every edition.