Gal☆Gun (ぎゃる☆がん) is a first-person 3D gAn shooting game developed by Inti Creates and published by Alchemist for the Xbox 360. ('眼, gan' means 'eyes' in Japanese)
It was remastered for the Nintendo Switch and PC (via Steam) in 2021, as Gal☆Gun Returns.
This tag implicates gal_gun_(series) (learn more).
