Dive deeper into eternal paradise with the official art book for The Caligula Effect: Overdose! This 72-page art book contains in-depth character profiles for the Go-Home Club and the Ostinato Musicians, English song lyrics for tracks featured in the game, a captivating short story to broaden your experience in Mobius, and a message from the director.

Go to: http://store.steampowered.com/ and download STEAM client Click "Install Steam" (from the upper right corner) Install and start application, login with your Account name and Password (create one if you don't have). Please follow these instructions to activate a new retail purchase on Steam: Launch Steam and log into your Steam account. Click the Games Menu. Choose Activate a Product on Steam... Follow the onscreen instructions to complete the process. After successful code verification go to the "LIBRARY" tab and start downloading.