We found 2 Reddit comments about Steins: Gate 0 Ost. Here are the top ones, ranked by their Reddit score.
https://www.amazon.co.jp/gp/product/B07F9Y8P97
Unreleased soundtrack. Wait until 19th Sep :) https://www.amazon.co.jp/dp/B07F9Y8P97
https://www.amazon.co.jp/gp/product/B07F9Y8P97
Unreleased soundtrack. Wait until 19th Sep :)
https://www.amazon.co.jp/dp/B07F9Y8P97