Cyberstorm 2

Description:  Sequel to MissionForce: Cyberstorm, the Corporate Wars have you join one of the eight corporations fighting each other for financial supremacy. Each of the eight corporations are expert in different areas and limits availability of certain parts. The tactical combat engine is turn-based with optional real-time combat mode, played in a top-down semi-isometric view. There are plenty of different vehicles and HERCs and plethora of different components for you to modify and customize.  (From Mobygames description)