This is an expansion and requires the base game to play: yes

Never let a cute face fool you, there's a beatin' awaiting you behind those cuddly smiles (didn't Pretty Pretty Smash Up teach you anything?!?!) But it doesn't end there, if you survive the onslaught of the teddy bears, you have rock stars, grannies, and explorers awaiting… seriously, what were we thinking?

Smash Up: What Were We Thinking returns to the wild randomness of the early days of Smash Up. By combining this expansion with your Smash Up sets, will you take Zombie Rock Stars against Explorer Dinosaurs? What about Time Travelling Grannies versus Teddy Bear Vampires? It’s all possible now! All your dreams can finally come true!