It’s fair to say that Arcen fell of the pace a little with A Valley Without Wind, but then AI War was one of the most accomplished debuts any studio could hope for. If A Valley Without Wind had a stumbling gait, AI War was striding along like the coolest cat in town. It doesn’t have the nattiest threads and but none of that matters once you sit down and play. Ancient Shadows is a new expansion coming for the game, which pits emerging intelligences against players in conflicts that feel as much chess as tower defense or RTS. That’s a new expansion three years after release and it looks like a significant one. The beta is available now for pre-orderers. Details below.