The gameplay loop is simple: Kill demons -> Get loot -> Kill stronger demons -> Get better loot. The "Eternal Collection" comes with all the quality-of-life updates that Blizzard has rolled out over the last decade. This includes Kanai’s Cube, Seasonal content (which works on Switch, though Seasons usually start a day or two later than PC), and the Adventure Mode.
Diablo III: Eternal Collection for the Nintendo Switch is the definitive version of the game, including all previously released expansions and exclusive Nintendo-themed content. As of late 2024, the game has been updated to (aligned with Season 31/32). Update Report: Ver. 2.7.7 & Latest Content diablo 3 eternal collection nsp updated