If you're willing to stretch things that far, a chess playing robot could be considered a DM who administers an extremely hyperspecific campaign which is isomor

If you're willing to stretch things that far, a chess playing robot could be considered a DM who administers an extremely hyperspecific campaign which is isomorphic to chess. Or, tic-tac-toe for that matter. A C-RPG captures D&D in the same sense that a WWII-themed video game captures the true World War II. In other words: not at all. A WWII-themed game applies WWII costumes, sound effects, etc. to an underlying game logic. Switching the WWII costumes to D&D costumes and marketing the result as D&D doesn't really make it D&D.