Site X

Site X or OKB 10 was an underwater research facility in Russian Waters located in the Arctic Ocean. It served as the headquarters for various Red Room programs such as the Hunter Program and the Skull Unit. Site X was the training facility for Ava Starr, Tretij Rebenok, Yevgeny Volgin, Antonia Dreykov, and the Skull Unit. It also served as Russia's submarine platform, which deployed various submarines. In 2025, Site X became the home for Mistral and Monsoon where they received most of their cybernetic upgrades.