Star Trucker has a basic core game play loop but it is executed competently. You are driving (flying? piloting?) a big rig in space, hauling cargo from Point A to Point B, chatting over a CB radio ...
With a premise like "driving a semi-truck, but through space," I wasn't sure if Star Trucker was going to be a novelty, a knock-off or noteworthy, but happily it turns out that it's the latter.