The perfect combination of RTS and Action-RPG in an immersive open-world sci-fi setting created by one man.
The Bifröst is an Asen technology which allows you to travel not only between dimensions, but also trillions of light years in minutes or even seconds. BTW: distance from Asgard to Earth is ~700 billion light years and one dimensional jump. But for this technology to work with high accuracy the Bifröst needs something called a Beacon to lock on: and thats what the Beacon Porters are needed for.
Beacon Porters, like Harvesters, are also almost exclusively Centaurs due to the heavy card they are carrying around. In that cart are some supplies, but most importantly the Beacon and a proper energy source (the huge crystal).
From the gameplay perspective these units work like the Dozers in Command & Conquer Generals - though I am currently not sure if they should be one-use or multi-use. Once a Commander gives the Porter the order, this unit will move to its destination and place a Beacon so the Bifröst can transport the ordered structure from Asgard to the battlefield.