A feature of a game — co-optional game may be played both cooperatively and competitively during a single playthrough.


Co-optionality is not currently popular in non-digital games. Co-optional computer games are usually:

  1. real-time (as opposed to turn-based)
  2. arcade-like, i.e. require skill usually both of manual dexterity and quick decision-making;
  3. with broad goals and imprecise win condition. You know you generally win when you get to the end of the level. But should it be as fast as possible? Faster than your opponent? This is up to you.

We can see that all three qualities apply rather easily to music games. Success of a singular play usually depends on timing and decisions should be made fast. What's more, according to the "first rule of music games", there is usually one general and very loosely defined goal of a music game: it is to make good music. But what that means? It's up to you. And you may find that you share some of that idea with other participants or that great music may come from a well played opposition of ideas.

Co-optional games:

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