Making games is hard. Making multiplayer games is 10x–100x harder. This chapter explains why, diving into the differences between making a single-player game vs. making a multiplayer one. First, you’ll learn about the lifecycle of both types of games. Then, I’ll show you the differences in playtesting. Finally, we’ll talk about the architectural differences between those types of games, and you’ll learn why developing “just the game” is not enough. At the end of this chapter, you should have a clear understanding of why multiplayer games require way more resources (and luck) to become successful.