"Well," says Shephard, "Borealis has an on-board portal generator that ain't like nothin' the Black Mesa folks ever developed. Give her the right coordinates and Pi'll open a portal to places a Black Mesa teleporter can't reach. I ain't too sure if she needs a borderworld same as the Black Mesa folks do, but I'm kinda wonderin' if there ain't some way of workin' out a set of coordinates for Barsoom, seein' how the whole point of a lot of that portal shit was to git her to another universe altogether anyways."