There is an old way to play D&D solo or without a DM. It involves a large collection of word tables, used to generate prompt. Then player forms clarifying questions and assess them likelihood. The D20 used to roll of these questions is called oracle. If likelihood is unknown from the world lore, it is defined by a d10 roll. E.g. what chances there are negroes in our fantasy world city? The system even includes entropy/temperature/chaos-factor.
But in theory it can be used to roleplay anything. Even monopoly. Do stock markets crash today? Can we bribe the officials? Can we organize niggers to lower property prices?
Suddenly a boring stupid game becomes a nice tool.
Usually people use it to roleplay specific scenes from books.
There is also a lightweight character generator, called Fate Core, which introduces characters on top of this prompt+oracle framework Compared to D&D, Fate Core characters are sets of "aspects". So you can quickly setup a spiderman vs batman fight. Try that with the obsolete baroque 5e D&D generation.