Maybe a game could be created that's an autonomous CCG game - so the 'game' is played half on self hosted servers where you take a set of cards, configure and b

Maybe a game could be created that's an autonomous CCG game - so the 'game' is played half on self hosted servers where you take a set of cards, configure and build your 'deck' and play test games with yourself (potentially just locally), then you could engage in 'ranked battles' on controlled servers which have the authority to issue new cards. Each server could have an allowlist of which servers' cards are playable on their server, so it would allow for a decentralized network of card issuers and a web of trust to determine which cards are valid in which contexts. (Gameplay doesn't necessarily need to be card-based, could be autonomous entities like soldiers and tanks with a set of buff/modifier cards.)