Ensure your Switch custom firmware (Atmosphère) is updated to support the crypto-keys required by the latest game updates.
Adds the Japanese regional variants for almost every game in the collection, providing localized title screens and gameplay differences. Contra Anniversary Collection Switch NSP UPDATE
If you are looking to purchase the game, keep an eye on Limited Run Games for potential physical re-releases or check the Nintendo eShop for sales, which have previously seen the collection discounted by 75%. Ensure your Switch custom firmware (Atmosphère) is updated