Nintendo prototyped a Zelda in the '90s that was a lot like Portal - PC Gamer

[RetromanIE]

<a href="https://www.pcgamer.com/au/nintendo-was-developing-portals-like-portal-before-it-was-cool/" target="_blank">Nintendo prototyped a Zelda in the '90s that was a lot like Portal</a>&nbsp;&nbsp;<font color="#6f6f6f">PC Gamer</font>

More... (https://www.pcgamer.com/au/nintendo-was-developing-portals-like-portal-before-it-was-cool/)