Multi-User Dimensions (MUDs), also known as MU*, are virtual worlds composed entirely of text. These platforms, often structured as RPG-style games, serve as niche internet communities. Players access MUD servers using telnet clients, with specialized applications providing features like logging, color support, aliases, and mapping.
In a MUD, players are represented by a textual avatar within a 'room,' which has a written description and lists of objects. Rooms can depict diverse settings, from a lion's den to outer space. Interaction with the game world occurs through text commands, ranging from simple actions like 'get sword' to complex instructions such as 'look at gemstones on tiara' or 'pilot ship 500 meters north'.
The concepts in MUDs share similarities with interactive fiction (IF), which can be considered the single-player equivalent. However, MUDs distinguish themselves by focusing on collaborative or competitive engagement within a real-time, constantly changing environment. This dynamic nature allows the virtual world to react to player stimuli, simulating various systems based on the codebase and design.
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Multi-User Dimensions (MUDs), text-based virtual worlds, continue to exist as niche online communities, offering RPG-style gameplay and social interaction through text commands. These platforms provide a unique, immersive experience distinct from modern graphical games, emphasizing collaborative or competitive real-time environments.