the items included in the NES version are a more powerful machine gun upgrade, an unlimited grenade upgrade, and "glasses" to let the player view all the hidden bunkers. The player will lose these upgrades after losing a life. Extra lives are given at 10,000 points, and per 50,000 scored up to 960,000; thereafter, no more lives. Play continues to the last Super Joe dead, which ends the game. The arcade version contains eight unique levels. The NES version contains only four unique level designs, but repeats those levels with minor changes and increasing difficulty to create a total of sixteen levels. Development The game was developed by Capcom, where it was designed by Tokuro Fujiwara. He was concurrently leading the development of both Commando and Ghosts 'n Goblins at the same time. Both games sold well for Capcom upon release. Ports A home version of the game developed by Capcom was released for the Nintendo Entertainment System. Activision released a port of the game for the Atari 2600 and INTV released a port for the Intellivision, also an Atari 7800 version by Sculptured Software was released in 1989. Elite released versions for many home computers. They released the Commodore 64, ZX Spectrum, BBC Micro and Amstrad CPC versions in November 1985. The BBC Micro and Acorn Electron versions were developed under contract by Catalyst Coders, while Elite developed the Amiga, Atari ST, Acorn Electron, ZX Spectrum, Amstrad CPC and Commodore 64 versions. The Commodore 64 port's theme, a more complex and extended version of the arcade music, was created in less than 12 hours by Rob Hubbard, "[I] started working on it late at night, and worked on it through the night. I took one listen to the original arcade version and started working on the C64 version. [...] By the time everyone arrived at 8:00 in the morning, I had loaded the main tune on every C64 in the building! I got my cheque and was on a train home by 10:00". The arcade version was re-released on the Virtual Console as Wolf of the Battlefield: Commando in Japan on October 5, 2010, in North America on December 6, 2010, and in the PAL region on December 17, 2010. Unreleased versions The Atari 8-bit version was created by Sculptured Software in 1989, and was intended to be released by Atari Corporation for the XE Game System. However, although