The company's next release, "Temple of Apshai", was very successful, selling over 20,000 copies. As the game was not a "simulation" of anything, the company introduced the Epyx brand name for these more action-oriented titles. Rated as the best computer game by practically every magazine of the era, "Apshai" was soon ported from the TRS-80 to additional systems, such as the Atari 400/800 and the Commodore 64. "Apshai" spawned a number of similar adventure games based on the same game engine, including two direct sequels, branded under the "Dunjonquest" label. The games were so successful that they were later re-released in 1985 as the "Temple of Apshai Trilogy".