Collaboration with “The Caligula Effect” Series Begins October 28!

The in-game collaboration between “The Caligula Effect” series and “Faaast Penguin” begins October 28!

μ (Mu) and Regret are joining the game as limited-edition penguin costumes!

A variety of collaboration items inspired by “The Caligula Effect” series, including Rides, Ultimates, Emotes, and Nameplates, will also be available!

Collaboration Period: October 28, 2026 (Wed), 21:00 PDT – November 18, 2026 (Wed), 20:00 PST

34 Collaboration Items Available in the Shop

Collaboration items, including Skins, Rides, and Ultimates, will be available in the Shop. Don’t miss your chance to get them!

Photo Spots Have Appeared

Photo spots will appear in the Waiting Island and after reaching the goal. Take some photos together with your friends!

New Challenges!

New Challenges are here! Complete them during the collaboration period to earn Crystals!

About “The Caligula Effect” Series

Created by FuRyu, “The Caligula Effect” is a unique school-themed RPG series named after the “Caligula Effect” — the psychological phenomenon that makes people want to see what they are forbidden to see and do what they are forbidden to do.

“The Caligula Effect: Overdose” and “The Caligula Effect 2”, were developed by historia, the studio behind Faaast Penguin.

[Japanese Only]

The Caligula Effect Series Official X: https://x.com/caligula_GAME

The Caligula Effect 2 Official Website: https://www.cs.furyu.jp/caligula2/

The Caligula Effect: Overdose Official Website: https://www.cs.furyu.jp/caligula/od/

The Caligula Effect Official Website: https://www.cs.furyu.jp/caligula/