Coming to PC, Mac OS and Linux in April, Irish developer Starcave Entertainment (Galway) has taken to kickstarter to increase funding for its latest project, a hybrid FPS/ RTS called T.E.R.R.A. This link will take you to the Kickstarter Page.
Also greenlit by the Steam Greenlight program, T.E.R.R.A. supports instant swapping between FPS & RTS.
T.E.R.R.A. is an FPS (First Person Shooter) competitive team-based game set in the near future of the year 2099 against the background of the Solar System. Terraforming is the key to Humanity’s survival after an deadly World War 3 decades previously and the focus of changing the Galilean moons of Jupiter to habitable zones.