notably the 1977 role-playing game Oubliette. It was initially coded in Applesoft BASIC, but Greenberg and Woodhead rewrote it in UCSD Pascal after BASIC proved too slow to be playable. They had to wait for a run-time system, not available until early 1981, before publishing it. The game took two and a half man-years to complete, but the delay benefited Wizardry by permitting almost one year of playtesting and game balancing before release, distinguishing it from others such as Ultima I. Frederick Sirotek, Norman's businessman father and the company's financier, insisted that the packaging and documentation be professional, also distinguishing the game from others sold in Ziploc bags. The Commodore 64/128 versions of Wizardry 1-3 share a common code base with the Apple originals, as they all use the same run-time 6502 Pascal interpreter which provides support for overlays and low-level functions to interface with the hardware. USCD Pascal was also used for the IBM versions, but with an x86 version of the interpreter. Lengthy load time and extensive disk access was a problem with Wizardry; however, the Commodore versions, which particularly suffer from this, provided a variety of workarounds. In C128 mode, the VDC memory is used to store overlays and REUs are supported in both C64 and C128 mode. Wizardry 2-5 also detect if 16k or 64k of VDC memory is present and can use the 1571 drive's burst mode for faster load time. "Werdna" and "Trebor" are Greenberg and Woodhead's first names spelled backwards. Their names also appear as initials (i.e., ACG and RJW) on the map of the eighth and ninth floors. Sir-Tech published Wizardry, Revision 2 in 1982, which implemented a number of new features. John M. Morrison for The Space Gamer No. 50 commented that "By this time, your old disk should be wearing out. I definitely recommend sending the $5 in to transfer backup characters, as you'll get Revision 2 to boot." Reception and legacy Wizardry was a major commercial success. It shipped in September 1981 and almost immediately became a hit, the most popular Apple II game of the year. By 30 June 1982 it had sold 24,000 copies, making it one of the best-selling computer RPGs in North America up until that time. In comparison, Temple of Apshai (1979) had sold 30,000 copies and Ultima (1981) had sold 20,000 copies at the time. Electronic Games described Wizardry in 1983 as "without