I have intended to write about rule and algorithms more than a blog post. I think that it is important to understand the qualities of games in more detailed level than just games have rules.
However, I might not need to do this, because Markus Montola provides a nice typology of rules in his dissertation:
- Internal rules: the rules or limits that one set for oneself
- Social rules: for example, it is impolite to play too slow and keep other waiting)
- Formal rules: as in board game rule book
- External rules: for example, laws
- Materially embodied rules: game systems (including algorithms) in video and physical objects and bodies in a game
- Brute circumstances: environment and biology (Montola, 2012, pp. 42-43).
Rule types 2 and 3 relate to agreements and come with possibility of cheating. Rule type 4 is institutionalized form of rules and comes with possibility of breaking the law. Rule type 5 and 6 are different and they exist and regulate play despite the players will of changing them (of course there are some possibilities to influence these such as doping or modding a game).
Montola, M, On the edge of the magic circle, Tampere: Tampere University Press. Available at http://urn.fi/urn:isbn:978-951-44-8864-1.