hawkeyefan
Legend
Games with a baked-in setting live and die by that setting. Shadowrun and Warhammer Fantasy come to mind. Both are amazing settings, but the rules (depending on the edition) haven't always been as sharp as they could be. And as I get older, no matter how great the setting, I just don't have the tolerance for complicated, messy, or legacy rules systems.
An example of a game with the rules and world perfectly meshed for me would be The Spire. The world is fascinating, and the rules are easy to learn and help bring the world to life even more.
The Spire is a great example. As presented, playing a game must take place in the default setting. The classes/playbooks are all specific to that setting and everything revolves around the core expectation of revolution.
Yes, you could hack the game and make it take place in another setting or whatever, but it’d take some work to make it deliver any other kind of experience.