Gunner, HEAT, PC! (GHPC) is not currently available for free. While a basic alpha demo was free during earlier development, that version was phased out when the game entered Early Access on Steam. Currently, the only way to officially download and play the full game is by purchasing it on Steam .
These video guides offer visual walkthroughs of the fire control systems, basic movement, and tactical maneuvers for various tanks in GHPC: Gunner HEAT PC PC Game Free Download