Bah. Here's a press release from a couple of months ago:

https://finance.yahoo.com/news/microprose-ientertainment-network-inc-announce-152100191.html

In it, Wild Bill and David Lagettie mention the Unreal 4 engine. Boooooooooooooooooooooooooooooooooooooooooooooo. We want Outerra.