What were MUDs and MOOs used for during the 1980s and 1990s?

During the 1980s and 1990s, MUDs (Multi User Dungeons) and MOOs (object-oriented MUDs) served as foundational virtual worlds that functioned as persistent, shared environments for social interaction, performance, and competitive play.12

These systems were used for several key purposes:

• Social Interaction: MUDs and MOOs were designed to support communities where players could interact, chat, and build social relationships, often overshadowing the structured game content itself.123
• Role-Playing and Exploration: Inspired by games like Dungeons & Dragons and Adventure, these platforms allowed users to explore virtual spaces, engage in role-playing, and participate in fantasy-themed adventures.13
• Creative and Collaborative Play: They provided a space for performance and collective storytelling. MOOs, in particular, allowed for object-oriented programming, enabling users to contribute to the construction of the virtual environment.12
• Community Building: Many players remained active in these virtual spaces for years, forming guilds and long-term social networks that laid the groundwork for modern massively multiplayer online games (MMOGs).23

Hundreds of these themed, text-based multiplayer environments were developed during this era, utilizing dial-up modems and early network connections to link players globally.12