[1]: 140  Outdoor Geomorphs, Set One: Walled City was designed by Gary and also published by TSR in 1977.

[2] Steve Jackson reviewed the 1980 compilation of Dungeon Geomorphs in The Space Gamer #41 in 1981.

He considered the choice of color "a disappointment" and the "only real drawback", as the light-blue ink in which all the maps are printed makes them difficult to read.

Jackson concluded that the Dungeon Geomorphs is a nice buy for its price, but not a "must".

He noted that the walls, towers, and other structures are "clearly mapped out in blue on durable, white graph paper" with marked lines to allow them to be cut out; the square and rectangular pieces can then be fitted together in "almost any fashion" the DM desires.