A MUD is a text-based (generally) computer simulation based somewhat on Dungeons and Dragons. A typical MUD is set in medieval times and involve the players being able to choose their races and classes. Such races include elf, dwarf, angel, demon, dragon, and subraces (such as the drow elf). Classes could include mage, cleric, druid, warrior, paladin, etc. One of the main things for a MUD is escape. The role-play for a MUD allows the players to get away from real-life problems and real-life situations. There is also the adrenaline factor of going around killing things, and getting rewarded for it.