The game comes directly from Nintendo eShop, you will be able to go online, get updates etc.
After setup process the game will be available to launch on your own account, just as any other game or app you purchased directly in Nintendo eShop.
DOOM Eternal, the award-winning game and “one of the best first-person shooters ever” according to GameRevolution, is coming to Nintendo Switch. Developed by id Software and Panic Button, DOOM Eternal is the direct sequel to DOOM, winner of The Game Awards’ Best Action Game of 2016.
Hell’s armies have invaded Earth. Become the Slayer in an epic single-player campaign to conquer demons across dimensions and stop the final destruction of humanity. The only thing they fear…is you.