Marketing lapses as well as financial mismanagement led to declining real income for SPI, Along with former SPI designer Brad Hessel, he founded Ares Development Corporation to produce
video games. Simonsen had already successfully "
ported" the board game
The Wreck of the B.S.M. Pandora to the
Apple II, creating one of the first
real-time strategy games. A multi-game contract with
Texas Instruments fell through when they pulled out of the
home computer market in 1984. Simonsen then moved to
Richardson, Texas where, with Jerry Robinson, he co-founded Microbotics, manufacturers of peripherals for the
Amiga platform of home computers. Around 1992 Microbotics closed and he retired from active work, becoming a gaming network moderator for
BIX and other places. In 1993 Simonsen contributed to
Master of Orion: The Official Strategy Guide (Prima Publishing, 1993), devising a naming-convention for ships. By 1998 he had retired completely and spent his time drawing, writing computer programs and science fiction short stories. Simonsen suffered a heart attack in 2004 and two more in early 2005 which led to his hospitalization and death in
Garland, Texas, on March 9, 2005, at the age of 62. ==Awards and honors==