Other (objects, etc.) entity

Includes portals of some sort, used for rapid transportation from one place to another. Often these have the outer appearance of door frames with fancy light show.


The first video game about Portals was released in 1988.

Valve, THQ and Klei Entertainment has published most of these games

These differ from teleportation by that both locations are effectively folded to meet at the portal. The portal may link to alternate dimension, or function as other method of entering new unknowns through something vaguely familiar.

In SciFi the portal is often shaped as a ring, especially if it's located in space.