the maps xsokoban0001-0091 are in the public domain and were taken from xsokoban
the maps gri* are made by GRIGoRusha and are released in the public domain
the maps sasquatch* and microban* were made by David W. Skinner and taken from KSokoban
the maps mgerhardy* were made by Martin Gerhardy and are released in the public domain (CC0)
the maps multiplayer* were made by Martin Gerhardy and are released in the public domain (CC0)
