Steins;Gate x Sanrio Characters: Chance Encounter of Goldich Party is a 4-part online visual novel released on April 23, 2020 on the website http://steinsgate.jp/10th/project6/, where it can be played for free in Japanese.

It is part of a collaboration between Steins;Gate and Sanrio Characters, and has the lab members meet Hello Kitty in the bizarre 0.549111α world line. This Sanrio Characters collaboration is the 6th of 10 projects to celebrate the 10th anniversary of Steins;Gate. It was officially announced on Twitter at https://twitter.com/kagakuadv/status/1221347429846355972 on January 26, 2020.

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