This series contains materials from two play-by-mail games, Tribes of Crane and Warp Force Empires. Tribes of Crane was one of the earliest play-by-mail games with a large fan base. The player’s manual was quite short and the players needed to write “special actions” to obtain additional information about aspects of the game. Items in the series related to the game include special information handouts, and miscellaneous sheets created by players to expand game options.

Warp Force Empires was notable because it was designed to be completely anonymous and any indication that players were communicating outside the game system resulted in expulsion from the game. It also sought players who would pick up abandoned positions in a running game as “standbys,” who would be rated on a different system than the regular players. Players requested specific classes of races with very different goals and scoring actions. The one who gained the most points during a game was the winner. Games had a minimum and maximum length, and a complex set of rules that would determine the end-term once past the minimum. Items in the series include all documentation and results of a game of Warp Force Empires.