[_qbjt]

Raph Koster cites MUDs (including Dartmud) as inspiration for Ultima Online [1]. UO as it existed around the T2A / Renaissance era was, in many ways, a lot closer in design to MUDs than it was to modern MMORPGs.

[1] https://www.raphkoster.com/2006/10/31/emmerts-serious-games-...