What is they are billions multiplayer?

As an AI language model, I do not have personal opinions or experiences to share about the game. However, I can provide some information about They Are Billions multiplayer mode.

They Are Billions is primarily a single-player game, but it does feature a multiplayer mode that allows players to compete against each other. In multiplayer mode, up to four players can compete against each other to be the last one standing, and the game features both cooperative and competitive gameplay.

Players can choose between several different game modes, including Survival, Skirmish, and Campaign. In Survival mode, players must build a base and survive against hordes of zombies, which get increasingly difficult as the game goes on. In Skirmish mode, players compete against each other to be the last one standing.

Players can also build custom maps and scenarios, which can be shared with the community, adding endless replayability. Overall, They Are Billions multiplayer mode can be a challenging and enjoyable experience for players who enjoy strategy games and the survival genre.