Steins; Gate 0 is a Japanese-only visual novel game developed by 5pb. that was released for Playstation 3, Playstation 4 and Playstation Vita in December 2015. The game is now making its way to PC and will be released on June 24 2016.
Most of the time is spent reading texts in the game, with minimal interaction required from the player. Decisions are to be made though, and this is where the biggest change from the original Steins; Gate comes in. Replacing the ‘Phone Trigger’ is now the RINE trigger system, with the use of the in-game smartphone to send messages to other characters in real time. Incoming messages will activate a notification to simulate a real-life situation, and the characters will react different depending on the messages sent.
Steins; Gate 0 is based on a light novel trilogy called the Epigraph Trilogy consisting of Steins;Gate: Epigraph of the Closed Curve, Steins;Gate: Pandora of Eternal Return, and Steins;Gate: Altair of the Point at Infinity.
The plot, as summarised by Wikipedia is as follows:
“The story follows after Rintaro Okabe returns to the Beta timeline where Kurisu Makise is fated to die. He failed in his attempt to save Kurisu, only to accidentally kill her instead. The protagonist later suffers from serious Post-traumatic Stress Disorder and tries to cope with his failure to save Kurisu. He later meets Maho Hiyajo, a neuroscientist working on a program called “Amadeus” which allows the copy and digital recreation of a person’s brain into an Artificial Intelligence avatar of said person. He is later surprised that Hiyajo managed to create an AI copy of Kurisu using Amadeus, before the latter’s death.”
Steins; Gate 0 is around 7,800 Yen if bought through retail which is around $70 USD right now. The limited edition is 15,000 Yen, translating to around $130, so overall it’s slightly more than usual for a typical Western game.