Any variable data relating to games in /usr should be placed here. /var/games should hold the variable data previously found in /usr; static data, such as help text, level descriptions, and so on, should remain elsewhere, such as /usr/share/games.
As for /var/state, game variable data may be placed in /var/lib as a deprecated transitional measure. However, this allowance will be removed in a future release of the standard.
/var/games has been given a hierarchy of its own, rather than leaving it merged in with the old /var/lib as in release 1.2. The separation allows local control of backup strategies, permissions, and disk usage, as well as allowing inter-host sharing and reducing clutter in /var/state. Additionally, /var/games is the path traditionally used by BSD.