Plague of Shadows, the free content update for Yacht Club Games' indie title Shovel Knight, releases across all available platforms tomorrow. The expansion adds new playable characters, maps and other content. The game should automatically update when players launch Shovel Knight on September 17, but 3DS owners might need to take a few extra steps.

The in-game download option will not work if players try to access the Plague of Shadows update from the game's main menu on Nintendo 3DS. Instead, due to the game's size, players will need to manually install the update from the system's home menu or on the eShop. Additionally, Yacht Club Games have revealed that Shovel Knight will now take up less space on the 3DS.

A retail version of Shovel Knight, including the Plague of Shadows update, will launch on October 13, 2015.