Against the Horde is a companion app designed for fans of Tabletop Magic, specifically offering a cooperative experience for players of Magic: The Gathering. This app allows users to join forces with friends to battle against an automated deck, utilizing one of the seven pre-built horde decks included. Furthermore, players have the option to create custom decks or challenge hordes crafted by other users, enhancing the replayability and variety of gameplay.

This app serves as a tool for managing the horde format, which originated in 2011, requiring players to have their own physical decks of cards. It is important to note that Against the Horde is an unofficial fan creation, operating under the Fan Content Policy, and is not officially endorsed by Wizards of the Coast. The app offers a subscription model for additional features, with options for monthly or one-time payments.