Many games are tests of skill. Players succeed or fail at the game’s goals based on their physical dexterity and reaction time, general knowledge and reasoning ability, understanding and internalization of the game’s own mechanics - anything a game can test. But much of that skill is applied before the moment of success or failure.

Victory in a chess match may come from physically moving your piece into a position that checkmates your opponent, but that isn’t the hard part. And the hard part of beating Doom isn’t the button press that fires the last shot on the final boss - it’s everything you did to enable that shot. These goals, and indeed most interesting goals in games, actually have multiple stages of challenge that funnel into each other.

Here’s my conception of the phases of challenge. This is a fairly abstract framework, since it’s intended to be generalizable to every skill-based game. To help pin it down a bit, let’s take a closer look at each phase and then discuss how they interrelate. Once that’s done, I’ll go into some implications these ideas have for game design.