amemaker]] (1985), wargame construction set (1986), shoot'em-up construction kit (1987), mamirin / dungeon manjirou (1988), and arcade game construction kit (1988) appeared in the 1980s on home computers. "3d construction kit" was released on the zx spectrum in 1991, and contained a full polygon-based world creation tool. most of these early design frameworks are specific to one or another genre.