>>42156540I remember reading some outlandish claims like Miyamoto stating the 64DD would keep track of every footstep on the land, every signpost you cut to pieces, etc. and even back then I remember thinking it sounded kinda stupid, cutting a signpost and being unable to read it ever again, or having a terrain full of footsteps all over the place. From what I remember Ura Zelda was just one of the two Zelda-related projects for the 64DD, the other being Zelda Gaiden, which ended up becoming Majora's Mask.
I wonder if the A+B builds are still playable, and if there's a compiled binary somewhere. Same with 1995 Shoshinkai SM64, I wonder if all the old sounds, models and textures just got overwritten and are now lost or if Nintendo kept older builds for archival purposes.
I was gonna say 1989 SMW, then I felt like I've seen most of it, with the SNES service carts and the available screenshots, and the sprite sheets. It probably plays a lot like retail SMW. There are fan recreations for these, which is arguably better than a romhack in which you don't know what's fan-made and what's sourced from actual development materials, and definitely better than nothing.
Any of the rumored Zelda 2 tech demos would be incredible, too (there's one for the SNES of which we have only one screenshot, and there's also a GBA one that supposedly was an overworld with scrolling clouds) since the only proof we have of them existing, other than stamp-sized literal shots of a screen, is a Zelda 2 song on a SNES test cart. Oh yeah there's also that StarCraft prototype running on the WC2 engine that looks delightfully clunky. There are a lot of SC protos that looks very different from the final game, but that one looks just like WC2 in space.
