Bohemia are the latest to try to make the RTS/FPS hybrid happen, bless them
I'm old enough to remember Battlezone (1998) and Command & Conquer: Renegage and the years since are littered with umpteen games that try to combine RTS commanding with FPS conquering. The latest to try is Silica, from Arma 3 developers Bohemia Interactive. You'll find the announcement trailer and its many crabs below.