Multi-User Dungeon

StatusReleased December 1978 · 48 years ago

No estimate yet — collecting data since Nov 5, 2026

Multi-User Dungeon, or MUD (referred to as MUD1, to distinguish it from its successor, MUD2, and the MUD genre in general) is an early MUD and one of the oldest examples of a virtual world in existence.

Frequently asked questions

Is Multi-User Dungeon dead or still active?

Multi-User Dungeon is listed as released, but we don't have a recent player-count estimate that shows current activity, so we can't confirm whether it is still busy. We publish one as soon as there is enough fresh data.

When was Multi-User Dungeon released?

Multi-User Dungeon was released in December 1978.

Frequently asked questions

Is Multi-User Dungeon dead or still active?

When was Multi-User Dungeon released?

Screenshots