I created a custom 3D game and when I launch it in ReactOS I get an error (see screenshot) about how the memory can't be read. I've tried it with and without Virtual Box Direct3D and it still fails. Same thing happens when I try to launch the DirectX 8 and 9 versions of the game. I tested it under WINE and it works fine if that's of any use. The software version of the game works fine.
I've uploaded a zip file containing the software, OpenGL and DirectX 8 and 9 versions: https://www.mediafire.com/?o3psf8h623vgbnx