Nintendo programmer has shared a video showing that Nintendo 64 classic The Legend of Zelda: Ocarina of Time had functioning portals before the game Portal. The video comes from Giles Goddard – who worked at Nintendo in the ‘90s and was responsible for the iconic Super Mario 64 opener with the interactive Mario face – who shared the tech demo on his Twitter.Viewable below, you can clearly see that the player camera goes through a crystal, taking it from a round room instantly to a long corridor.