8-Bit Attack is a cooperative game where players work together as a team. Either you share victory together, or you are all defeated together. Although 8-Bit Attack is normally a 2-5 player game, you can play it solo if you control two heroes at the same time, which is not difficult.
In the core game you face off against a mix of different enemies: Lovecraftian outer gods, aliens, myths, and demons. Expansions each focus on one of these enemy types. With more of these, you can add more fun and variety to your assaults.