Norm's Worlds are a group of roleplaying worlds originally based on the first and second edition Advance Dungeons and Dragons rule set. Players are capable of travelling to each of the individual game worlds if they are able to find passage to each. The primary world is one call Altris. It is the fourth planet from its star and one of five planets that are able to support life in its solar system. These worlds are built from combining concepts of other gaming worlds. The technology levels of these worlds span from Stone Age cave dweller humans to highly cultured and "magically" advanced societies. This technology includes the use of Spelljamming ships to travel between planets and other gaming worlds. The highest physical technology levels remain in the medieval era, gunpowder and some types of crude gunpowder weapons do exist in some areas, however, magical weapons and devices tend to be more reliable.