The Switch version is the "definitive" edition, meaning you don't have to worry about missing out on crucial story or customization packs. Go to product viewer dialog for this item. Assassin's Creed: The Rebel Collection - Nintendo Switch

holds up brilliantly on Switch. It’s an open-world pirate adventure where you play Edward Kenway, a privateer turned pirate caught between the Assassins and Templars. The core loop – sailing the Caribbean, plundering ships, hunting sea creatures, and exploring islands – remains addictive and gorgeous.

Do not install the "Unlocker" NSPs from shady sites that claim to unlock Uplay rewards. These often corrupt the save file on Firmware 16.0+. Instead, use a save editor or complete the in-game challenges.