Turbo Grafx Express
The TurboExpress was a portable version of the TurboGrafx, released in
1990 for $249.99 (the price was briefly raised to $299.99, soon dropped
back to $249.99, and by 1992 it was $199.99). It was the most advanced
handheld of its time and could play all the TG-16's HuCard games five
years before the Sega Nomad could do the same for Sega Genesis games. Its Japanese equivalent was the PC Engine GT. It had a 2.6-inch screen, the same as the original Game Boy. It shared the capabilities of the TurboGrafx, giving it 512 available colors (9-bit RGB), stereo sound, and the same custom CPU at 7.16 MHz.
The optional "TurboVision" TV tuner included RCA audio/video input,
allowing the user to use TurboExpress as a video monitor. The
"TurboLink" allowed two-player play. Falcon, a flight
simulator, included a "head-to-head" dogfight mode that could only be
accessed via TurboLink. However, very few TG-16 games offered co-op
play modes especially designed with the TurboExpress in mind.