Roy Trubshaw (born 14 March 1959) was a Computer Science student at the University of Essex who co-authored MUD1, the first MUD, with Richard Bartle on a DEC PDP-10. Both of them worked together at Multi-User Entertainment, with Trubshaw being the company’s technical director, to create MUD2 the second generation of MUD. Trubshaw now works as an independent contractor.