Sometime in 2024 a publisher called BD Games was banned from Steam, taking with it numerous smaller games. Bioprototype from Emprom Game recently returned to Steam without a publisher, and it's free to claim and keep for a while.
Read the full article here: https://www.gamingonlinux.com/2025/05/after-their-publisher-was-banned-from-steam-bioprototype-returns-and-its-free/