Before Eugen Systems went big – in scale and, eventually, sales – with the Wargame series, they worked on two Act of War games. More traditional real-time strategy fare, they were as much about base building and resource gathering as they were accurate tank physics. They even had live-action cutscenes spliced together with machinima.
Now Eugen are returning to the format with Act of Aggresion: a successor to the old series with similar mechanics, a similar near-future setting, but yeah, still lots of tank physics. The first teaser trailer is below.