The GBA Card e-Reader, with printed cards you physically slide through the slot — and a modelled N64 controller with its Controller, Rumble and Transfer Paks, plus the Expansion Pak, the FM Sound Unit and the Power Base Converter.
Expansion hardware as real objects — a Sega CD under a Mega Drive, a 32X in its slot, a 64DD, a Super Game Boy, a Sufami Turbo — plus live Satellaview broadcasts on PCVR, an event-driven serial link, a record player you cue by hand, and foveated rendering working on Quest at last.
A serial link API for libretro — Game Boys, GBAs, a GameCube and two PlayStations cabled together — plus save states, a modelled PlayStation, a remodelled Wiimote and Nunchuk with working motion, and capacitive finger tracking.
RetroAchievements, PS1 memory cards you slot in by hand, a Wii with a sensor bar you place on the TV, four composite inputs, and a stereoscopic 3DS.
