Jump back in time and free your inner caveman. Smash heads in this cooperative platformer game. Play solo or team up with up to 4 players. Different playable characters: Choose one of the playable characters, but don’t worry! You can change your character at any time in the game and play with them all! 1-4 players: Play solo, with one, two or three friends. Work together to become unstoppable! Varied Enemies: Each level has different enemies, watch out as they can catch you unguarded. Secret Levels: Unlock secret levels inside the game for more excitement! Challenging: Challenge yourself to unlock all the achievements!