Sentinels of the Multiverse: Rook City Renegades expands the recently-released Sentinels of the Multiverse: Definitive Edition (see "'Sentinels of the Multiverse Definitive Edition'"). It adds new heroes, villains, and environments to the core game. The new expansion also introduces a new game mechanic with "Suddenly!" cards, which can be played instantly and have effects that shake up the gameplay. Certain effects can also give cards in players' hands the "Suddenly!" keyword.
The Kickstarter is fully funded at $249,642 with 3,392 backers (about $74 per backer). This Kickstarter is projected to be delivered in January 2023.