When saving a game in Vanilla Doom, some game options are not preserved. This includes the following settings: * Respawning monsters (-respawn) * Fast monsters (-fast) * No monsters (-nomonsters) * Deathmatch (-deathmatch and -altdeath) The affected options are mainly relevant when playing multiplayer. When restoring a network savegame, the bug can be circumvented by adding the appropriate options onto the command line.