I want to buy and own single player games. I am fine with renting multi player game server access. But I want to ensure that if I invest time and money in a g

I want to buy and own single player games. I am fine with renting multi player game server access. But I want to ensure that if I invest time and money in a game, the servers have an open source DIY end state when the company decides it doesn’t want to host the game anymore.