Tbh, I hate it when people say Portal doesn’t fit in with Half-Life. Have you seen the Black Mesa Research Facility? They have giant crushers for no reason, just like Aperture. Aperture spans miles deep underground and Black Mesa spans miles in width. They both have localized portal technology, they both have turrets, they both have people who runs the companies into the ground, they both have giant spinning fans, both have pits of acid, and both are consistent to each other. I see no issue.