SSI's contract with TSR, Inc. required the former to stop using the Gold Box engine, so the company released its development tools.

However, some art, such as walls, combat backdrops, and title screens, could not be changed in the unmodified game.

The fanmade game design program Dungeon Craft (originally called UA Forever) is a standalone program that partially emulates FRUA's engine, but with a greater ease of user modification.

[4] Computer Gaming World in 1993 called it "the best adventure-construction kit available" despite the "sorely lacking" Gold Box engine.

[8] James Trunzo reviewed Unlimited Adventures: Fantasy Construction Kit in White Wolf #37 (July/Aug., 1993) and stated that "UA comes with well-written and very complete documentation which includes a number of essential tutorials to give you a feel for design.