For the best, most stable, and legitimate experience, the only recommended method is to purchase Attack on Titan 2: Final Battle directly from the Nintendo eShop or as a physical cartridge.
The Switch version also supports online multiplayer for up to 8 players. This requires a paid Nintendo Switch Online membership. The online "Another Mode" includes cooperative missions and competitive modes where you and your friends can hunt Titans together or test your skills against each other. attack on titan 2 switch nsp update dlc exclusive
However, the Switch version has two unique features: For the best, most stable, and legitimate experience,