|Headquarters||Miltipas, California, USA|
Tengen was a subsidiary of Atari founded by Randy Broweleit. The company was founded to target the console market, specifically to port existing Atari and Namco games. Tengen sought discount rates from Nintendo explaining that they would be publishing highly successful arcade games to the NES, but at the same time, worked to reverse-engineer Nintendo's lockout chip. Negotiation attempts failed with Nintendo, and the engineers at Tengen were unsuccessful at reverse engineering the Nintendo's lockout chip. Not wanting to pay full price, and with the release date of the NES games drawing near, Tengen used the patent documents of the NES lockout chip to safely bypass the chip and produce unlicensed games. However, Nintendo successfully sued Tengen for illegally using their patent documents to reverse-engineer their patented lockout chip. Now, forced to play by the rules, Tengen had to pay the same high-prices for publication on the NES as other companies. When Time Warner purchased Atari in 1994, all the talent from Tengen was absorbed, and the company was dissolved.
The composers wrote the music in Music Macro Language using a sound engine which was converted from Atari's RPM music software. It is unknown who coded the NES sound engine, but it was probably David O'Riva or Lisa Ching.