I have never tried it but according to the release notes from 1.06:Stoker wrote:Speaking of odd aircraft, one of the weird assets I know of that I have no idea why it is there is the Tiger Tank. I have no clue why that is included, but there is a full 3d model and all of the associated files to make it function.
"Passing "-d" as a command-line option to RT3.exe will turn on the old RT3
debug menus. These let you modify several aspects of the game, such as
time-of-day and camera angle. They also enable driving the Tiger Tank and
flying the plane, though the latter does not work very well."
Wonder why the PopTop crew had a tank in the game as an easter egg rather than spending more time fixing things that they would have liked done.