Stellaris. I cheat and mod to put my empire in the middle of the galaxy and have extremely overpowered player-only technologies. Then I just explore the galaxy and guide the AI; usually picking a favorite and try to help them grow e.g. a peaceful uplifted species in a very hostile galaxy. I've also done this in multiplayer where I played a bit of a Game Master role. Built a quest line as part of my custom mod that had lore and let players slowly discover me and the galactic core (cut off from the hyperlane network; this was all custom scripted before mods like the birchworld existed on the workshop)

When I was a kid I would play driver 3 but I hated the driving part and would mostly walk. I also played a skateboard game and ditch the board, dress up like a spy or specops guy, and run around roleplaying various scenarios in my imagination (because I didn't have any games at the time that would let me stealth or run on rooftops, which is all I wanted)