Gun Gun Pixies is an action-packed third-person shooter game developed by Idea Factory. The game is set in a fictionalized depiction and features two characters, Usamaeru and Kamerieru, who travel to Earth to study humans and save their home planet Pandemo from an attack.

The Pixies infiltrate a girl's dormitory where everything is giant, including the girls they've come to study. The game is a unique blend of action and exploration with three stage types: "Search & Combat", "Pacification", and "Bathing", each with a different objective. The game features Sniper Vantage Points, where your bullets drastically increase in power. The game also includes stealth elements where the girls must never catch you.

The game offers a wide range of weapons, scopes, and costumes for the pixies to wear. Each character has a set weapon type, handgun or assault rifle, which players must choose wisely. The weapons are loaded with Happy Bullets with positive effects that players can use to gather information from the girls.

Overall, Gun Gun Pixies is an enjoyable game with a unique blend of action, exploration, and stealth elements. The game's storyline is intriguing, and the graphics are impressive. The game is suitable for players who enjoy third-person shooters and exploration games.