The Tenchi-Muyo Game for the SNES was rather interesting, and the fan-trans isn't bad either.
A good collection of NES roms is about 200 megs, IIRC. SNES is a lot more. The complete MAME collection, sans NeoGeo, runs about 600 megs. With NeoGeo, its about 1.5 Gigs. Of course, if you could fit a decent little computer on that ring (say, a P100 or so), NES/SNES are playable, and so are gameboy roms (if you can find a copy of NO$GMB still around) and some NeoGeo Games (NeoRageX rocks), although, for the latter, the frameskip will be horrible.
What you are forgetting are books. Text format are great, although I'll use PDF for things with a lot of pictures.
Just my $.02
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