The story of grey market G2A worsens, I really do recommend to stay away
You have probably heard of G2A by now, the grey-market where anyone can sell second-hand keys for some money. The problem is, someone pointed out how they do no actual checks on keys and that resulted in them getting banned.
How to setup OpenMW for modern Morrowind on Linux / SteamOS and Steam Deck
How to install Hollow Knight: Silksong mods on Linux, SteamOS and Steam Deck