Don Turnbull reviewed Citadel of Fire for White Dwarf #9, and rated it a 6 out of 10.[2] He commented that "Seeing – and being enormously impressed by – the recent TSR modules has rather spoiled me! In fact the outstanding quality of the TSR modules puts others into perspective as presentable, workable settings but not blessed with the thorough and meticulous approach which a product of outstanding quality must possess. The designer has done a workmanlike job, but I can't help feeling that there should by now be a number of 'amateur' designers who regularly produce scenarios of equal quality for the limited audience of their own players – things have progressed a great deal since Judges' Guild material first came on the market, yet the products of the Guild have remained at about the same quality level."[2] He continued by saying "To a novice designer – particularly one not yet ready for the sophisticated, complexity and toughness of the TSR Modules [...] this will be a useful addition to the collection and a helpful guide to design. To those who can now count themselves as veterans this may appear as rather run-of-the-mill with little to justify the cost. For the player, it is quite a simple dungeon/setting to explore apart from the areas containing the Demons".[2] Turnbull concluded his review by saying, "A useful product but not one which can now attract the praise which would have been heaped on it two years ago."[2]
Patrick Amory reviewed Citadel of Fire for Different Worlds magazine and stated that "This one is another of the Guild's earlier releases. Based on an evil wizard's tower, it is a typical D&D adventure, with nothing special to single it out from the crowd. A competent GM should be able to turn out one of these with his eyes closed."[4]