x64 Tribes is OpenGL only - no software mode or glide. on one win10 test box the x64 tribes crashed because there was no intel graphics driver installed by win10. instead some microsoft svga driver was chosen. after installing the intel graphics driver (which also installed opengl) it worked as expected.
so after installing windows always go into device manager and look at the drivers you have for network and video - look at the dates - make sure they are fairly recent - make sure the display driver identifies itself as nvidia if you have that, amd if you have that, or intel if you have that.