Possible, but super tricky. Good luck trying to sell a producer on minimizing dialog!

Live service means the content comes from the company’s servers, and likely changes rapidly. The quintessential example is Fortnite. Updates are expected, not merely necessary fixes. Duke Nukem 3D had all the content installed on your computer from day one, without expectation that it would change (unless you made your own maps, or downloaded maps other USERS made).