The only 3do to obj conversion we know about is done for game modding purpose, to be more specific to export and edit 3D models from computer games. This is done through export of the models to generic 3D format that can be then edited with Blender or similar tool.
Various modding tools for game engines exists, so these tools are probably your best options. Some 3D converters also list various 3D formats as supported, because these are often in standard 3D formats with just different extension. The polygon 3D Object Converter is popular choice for many.
3DO files were used in numerous games, for example Total Annihilation or Jedi Knight series.
Updated: January 16, 2024