Economic trade and supply/production sim in AI War universe, on procedural planets. Think Transport Tycoon, just better ;P The clue? You have to do economic connections, links, adjacencies and logistics in order to build a colony-ship, once launched you land on a completely undeveloped randomized planet with various things possible (extreme plant-growth, local nests, competition from aliens etc.) and all that to build up your colony, as it grows second and third colonies spawn needing even more resources.
In order to make this truly infinite, the maps work like in Sim City 4, border connections are possible, and you can travel to a different planetary sector, build up infrastructure there and send all the goods to the border, where they then spawn on your home map so to speak.