While Minecraft is a game that could be classified as a centralized game (I see, it has already been mentioned😅), it is possible to create servers with custom software that use decentralized structures.
Custom software could enable everything, like adding creative worlds to the game which allows to store the buildings that have been built directly to the blockchain to then view it. Viewing is not the only thing that could be done here on Steem, but also creating fun parkours, adventures or other little minigames could be built and then shared using custom software to be accessible on multiple servers that are running this custom software.
Why do I think that Minecraft could fit on Steem well?
In Minecraft, players create something new, content which can then be viewed by others is exactly what we already do here on Steem. Commenting these worlds, voting on them could create a trending page out of exciting worlds to visit or play.
While I really would have liked that there is a ready to use solution for this, there was nothing like that available, which is why I'm currently creating a solution here.
Of course, recreating Minecraft would be too much work, which is why I'm just adding a additional layer for blockchain storage on top.