Mark Acres is a game designer who has worked primarily on role-playing games.
Mark Acres assisted Rick Krebs assisting in his development of the role-playing game Gangbusters. Acres also worked with Jeff Grubb on ideas for TSR's 1984 Marvel Super Heroes roleplaying game.:198 Between 1983 and 1984, approximately 200 people left TSR as a result of multiple rounds of layoffs; as a result Acres joined CEO John Rickets, as well as Andria Hayday, Gaye Goldsberry O'Keefe, Gali Sanchez, Garry Spiegle, Carl Smith, Stephen D. Sullivan, and Michael Williams in forming the game company Pacesetter on January 23, 1984.:197 Acres did some freelance work for Mayfair Games after Pacesetter ceased publication in 1986.:198–199
His D&D design work includes Tomb of the Lizard King (1982) and New Beginnings (1991).