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The Caligula Effect: Overdose (Caligula Overdose in Japan) is a JRPG developed by Historia for the PlayStation 4. It is a remake of The Caligula Effect. In 2021 it received a sequel entitled Caligula 2.


Caligula Overdose was announced alongside the anime adaption of The Caligula Effect as a remake of said game. Overdose features drastically upgraded visuals and processing with the Unreal Engine 4 and PlayStation 4 compatibility, and a route about two times the volume of the original scenario.


Caligula Overdose follows the same plot as The Caligula Effect. Unlike the original, Overdose features a brand new route, a "Forbidden Musician Route", which allows the player to become a double agent between the Go-Home Club and the Ostinato Musicians. The game also features multiple endings.

Changes compared to The Caligula Effect

  • Several new characters has been added to the PS4 version. Those characters are:
  • A "Forbidden Musician Route" and multiple endings has been added.


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Core gameplay is unchanged in Overdose. It's still a dungeon-crawling RPG featuring turn-based combat, using the Imaginary Chain system to predict your combo results and the Causality Link to connect with over 500 students across Mobius to recruit for your party.

Changes compared to The Caligula Effect

  • Overdose features revamped UI and graphics.
  • Game over requires a total party kill, where previously, the Protagonist alone falling was enough to cause one.
  • Simplified Causality Link; Affinity with NPCs rises faster and you only need to do one sidequest rather than two.
  • New special moves in the form of flashy Overdose Attacks
  • Ability to re-fight boss battles, including Go-Home Club fights as Lucid
    • Not available until postgame
  • The development of the story and the reaction of the people will change depending on the protagonist's gender. If the player chooses to play as a girl, there will be places the female protagonist can go where a male protagonist cannot.
  • The player can now form parties with the Ostinato Musicians.
    • Mix-and-matching Go-Home Club members with Ostinato Musicians is not possible until postgame


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This article or section is a stub.

Like the original, Tsukasa Masuko returns as the composer for Overdose. With a brand new main theme: Cradle, performed by RePLiCA, now with the addition of Himika Akaneya. New theme songs are made for the new characters, such as Suicide Prototype for Lucid and Onboro for Kuchinashi


External links


[v · e · ?]
Go-Home Club​: Protagonist (Ritsu Shikishima)  •  Shogo Satake  •  Izuru Minezawa  •  Kotaro Tomoe  •  Kensuke Hibiki  •  Kotono Kashiwaba  •  Naruko Morita  •  Mifue Shinohara  •  Suzuna Kagura  •  Ayana Amamoto  •  Eiji Biwasaka
Ostinato Musicians: Sweet-P  •  Mirei  •  Ike-P  •  Thorn  •  Shonen-Doll  •  Shadow Knife  •  Wicked  •  Stork  •  Kuchinashi
Other: μ  •  Aria  •  Marie Mizuguchi  •  Koki Tadokoro  •  Himari Minamide