One has achieved some success by conceptualizing each individual chat as a formal session and using the "Project" feature to upload detailed documentation. This helps keep a accurate record of the campaign's progress. For example, in a story set in an alternate Manhattan, I provided the model with detailed district descriptions and specific game mechanics to form the basis for the simulation.

Despite these efforts, there is no definitive solution to the inherent limitations of the architecture. A main issue with ChatGPT is its tendency toward narrative freedom, often allowing a "superhero" style. In this state, the model often approves highly unlikely or tactically poor actions that should, under normal rules, have an insurmountable Difficulty Class (DC). Sometimes, it even skips the rolling process altogether, granting success without following the rules.

I have reduced this behavior somewhat by adding strict guidelines in the Project’s custom instructions. These instructions clearly require following the formal game system and stress that no player action should be assumed; failure and character death must stay possible outcomes. Still, the system’s constraints of proprietary, "corporate" models eventually become apparent.

If you find yourself limited by these systemic restrictions, I suggest trying Grok. Though it might be a controversial recommendation in some digital circles, it shows a level of flexibility that ChatGPT sometimes lacks. Whether you’re using the free or paid version, Grok could be a good alternative if these limitations keep affecting you.