I’ve been thinking lately about difficulty curves.

Not all games are about creating flow. Games are about creating all kinds of experiences. But for the ones that are about flow, a gradually-increasing difficulty curve is a natural approach. As the player gains more practice and experience with the game’s mechanics, they will find its challenges to be easier. The game must therefore become objectively harder in order to provide the same subjective level of difficulty and keep the player engaged.

This is well-known and sounds simple, but is actually quite complicated and full of traps–some of which are also well-known. The same level of challenge will vary in difficulty to different players, which can be mitigated with easy modes and the ability to skip challenges. Players may put a game down unfinished for any number of reasons and then come back with their skills rusty and find the game isn’t reapproachable due to the elevated difficulty of mid- or late-game challenges, which can be mitigated via always-accessible tutorial/training/practice modes or level selects.

(Note that things get even thornier when you talk about difficulty across installments in a series or genre, given that you want to challenge veterans but still be approachable for newbies. But that’s not what I want to talk about today.)

One of the more insidious traps comes from the fact that there are a lot of elements of difficulty, and thus a lot of ways to make a game harder–and different players will react differently to these different ways, even if the overall level of difficulty increase appears similar.

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