Train Sim World should be the first game to recreate a real location as an open map simulator. By this, I mean London. Now that passenger mode has been added, it will make the London Underground feel amazing. Not to mention Zones 1-6, including all the lines and buses. A ticketing system should be added to this, to make it realistic. Ticket gates should play a purpose, and passengers should be able to use tickets, as well as players (multiplayer would make it gg). However, I understand how difficult this would be (I don't really know anything). If players want London, they should play along with the program construction. London should be published, piece by piece, through updates and betas.