Smash Up: Oops, You Did It Again is a standalone two-player-only game that can also be used as an expansion for other Smash Up titles. The four factions to be included in this set are Vikings, Cowboys, Samurai, and Egyptians.

Two players can play with just these decks, or mix them with original-recipe Smash Up for up to 4 players, and is compatible with all other Smash Up expansions!