MUD1 - How Online Role-Playing Games Were Born

In the world of computer games, it’s hard to overestimate the influence of a single project: MUD1, the first Multi-User Dungeon (MUD) role-playing game. This text-based online game not only gave birth to the entire genre of MUDs but also indirectly inspired the concept of multiplayer online games, which we now know as MMORPGs.

Origins: From Zork to Networking

MUD1 was created in 1978 at the University of Essex in the United Kingdom as a project by two students, Roy Trubshaw and Richard Bartle. The inspiration came from the text-based world of Dungeon, a predecessor of the older game Zork. The game itself ran on a DEC PDP-10 computer—a popular mainframe of the time.

DEC PDP-10 - The Computer That Laid the Foundations for Online Gaming

The PDP-10 (Programmed Data Processor-10) was a mainframe computer developed by Digital Equipment Corporation (DEC) and introduced in the late 1960s. It was one of the most significant academic computers of its era, especially in research and university environments.
What set MUD1 apart from earlier text-based adventure games (such as Colossal Cave Adventure or Zork) was the fact that multiple people could play simultaneously, interacting with each other within the same virtual world.

Multiplayer Before the Internet Was Widespread

Initially, the game was only available on the university’s network and was limited to students. However, starting in 1980, thanks to the university network’s connection to ARPANET—the precursor to the Internet—MUD1 became the world’s first multiplayer online role-playing game.
In the following years, external users gained access to the game via services such as British Telecom Packet Switch Stream and later through commercial platforms like CompuServe, where the game operated under the name British Legends until the late 1990s.

Gameplay Mechanics and the Text-Based World

MUD1 was entirely text-based. Players navigated the world by typing commands like north, look, or get sword. The game revolved around exploring locations, solving puzzles, and either cooperating or competing with other players in a fantastical world.
There were no graphics—everything was described in words. But despite this, the game’s player community grew quickly because the interaction with other players created a unique and engaging experience.

Legacy and Successors

MUD1 had an enormous impact on the development of online games: it inspired hundreds of subsequent MUDs and their variants (such as MUSH, MOOs, and MUX).
In 1985, MUD2, a more advanced version of the project, was developed as its evolution. The source code of MUD1 was later made available and preserved as an important artifact in the history of gaming.
Although today, 3D games with millions of online players dominate the market, the text-based world of MUD1 laid the foundations for the concept of shared virtual worlds. MUDs taught us that games aren’t just about graphics—they’re about interaction and community.

MUD1 Today

MUD1 (also known as British Legends) is still live and accessible online. You can join and play with other players just as you would in a traditional MUD.
The easiest way to play is directly through your browser—there’s an interface on the official website that allows you to connect without installing anything extra.
For example, you can visit the following site to access the game through a browser: https://mud1.org/.