Old School RuneScape. It's bigger than ever and just had their winter summit where they announced a bunch of stuff coming down the pipeline. It's decades of work by different people piled on top of each other to make this world where you interact with all the resources to qualify to complete quests. The name of the game is self-motivation instead of following a path that's laid out for you. In that way, people have made these breathtakingly beautiful accounts and projects like fighting the hardest boss in the game having access to only a restricted capacity to navigate around the game map to collect supplies and gear.

The gameplay itself, however, is akin to having a double wide chest in Minecraft and clicking around your inventory for 12 hours. Then you have the requisite herblore level for a quest which is a click and point adventure where you talk to people and solve a puzzle for them. Then you have access to another training method which is 15% faster than what you were doing. Then you only spend 22 hours instead of 25 grinding out requirements for the quest you actually wanted to do in the first place. Every breakthrough moment allows you to do an even longer grind than you had just completed to get the breakthrough.