Driving a car is 2D
Flying a plane is 2.5D
Playing DEEP Space is true 3D
Ever flown in no gravity, where up is relative?
How about all that inside a cavern or large building?
Now's your chance to experience combat in full 6DOF in a style similar to the Descent series.
realistic truck & car simulator, with OpenGL graphics
update:
https://sourceforge.net/projects/newctruck3drally/
It's a 3D, physically realistic truck/car simulator, oriented to dirt tracks. This is subsancially kept as hystorical. The environment is a hilly terrain which can also be user-defined in the form of a Bitmap image file (where intensity of red component defines height). It's similar to the classic "Terep 2". Particular care for internal cam. Written in standard C. There's a Windows executable ready for use, but it's compilable...