NEC’s Tetris Processor
leadedsolder.com
leadedsolder.com
It can't quite be replicated on modern displays. Even screenshots don't do it justice. It's the closest thing to newsprint until the kindle.
In 1988, BPS produced Tetris for many computer platforms in Japan, including FM-7, MSX2, PC-8800, PC-9800, X1, X68000, and Family Computer (NES). Some of these are NEC products. By 1991, when the word processor version was released, Tetris had been ported to even more machines including TRS-80, Amiga, ZX Spectrum, and Macintosh.
https://en.wikipedia.org/wiki/List_of_Tetris_variants
So I imagine the high polish of the game is due to existing industry experience and references.
It would be interesting to make it playable through qemu on archive.org
There is a byte-for-byte copy of the Flight Simulator for Tandy 1000, 1200HD, and 2000 disk floating around out there and it actually boots -- but says "Disk Error" when you try to actually start the simulator after the initial menu. So I guess someone will need to take a Kryoflux image in order to truly preserve the software... or write a trainer for it.