GGZ Gaming Zone: game backend library The ggzdmod library implements the communication between the main GGZ server (ggzd) and the game servers. Games use it to receive information about themselves, to report back results and savegames, and to control other run-time aspects. This package provides the run-time library used by most of the GGZ game servers. This package is part of the GGZ Gaming Zone, a multiuser networked gaming environment.