On a stock Switch, the update is seamless. On a hacked Switch, users manually source the update NSP (e.g., Contra Anniversary Collection [0100CA200B63A800][v65536][US].nsp ) and install it via title managers like Tinfoil or DBI.

: Contra III: The Alien Wars , Super Probotector: Alien Rebels Genesis/Mega Drive : Contra: Hard Corps , Probotector Game Boy : Operation C Technical Breakdown

For users managing their game library via Atmosphere, Ryujinx, or Yuzu, a "base NSP" is useless without the corresponding "UPDATE NSP." The current gold standard for the Contra Anniversary Collection is (sometimes listed as v65536 in hex editors).

: Addressed small bugs and improved overall system stability for smoother run-and-gun action. Contra Wiki The Story: "The Resurrection of Bill and Lance" In the year 2633, Earth’s finest commandos, Bill Rizer Lance Bean

Before dissecting the update, let’s establish the baseline. Released on June 11, 2019, for the Nintendo Switch, this collection includes ten titles spanning the arcade, NES, SNES, Sega Genesis, and Game Boy eras.