Is it possible to make a mod, with which you can also get tasks and at the end of the execution, the game ends. Example -: "Find transport (there will be 2-3 cars in the city and all are broken), find spare parts, fill up and leave the location. Finish. Or another option - To escape from the city during the day, otherwise the fog will descend in which the zombies are hiding and the city will drown in walking corpses. At the end of the time, the game will automatically end if you do not meet the conditions in time or die, and if you WIN, the game will end the same automatically and throw it into the main menu. I gave the simplest example so that you can catch the essence of my question, and so you can do tasks much deeper and more interesting, recreate stories from movies or invent them yourself. Is it possible to create such a thing, and if so, would you be able to do it?