I managed to extract the game files with http://aluigi.org/bms/castlevania.bms
and now I am not sure how to open the models with rigging, or if that's even possible. The two files of interest are a .msh file, and a .sm3 file. The .msh contains the mesh, the .mtl holds texture data (?), and the .sm3 might the rigging. I am aware of 3d Object Converter, though it doesn't seem to handle rigging.
The files appear to be connect to Castlevania Lords of shadow, and a few ways to extract the models are out there, but the blender script does not work for me and I do not own 3DsMax.https://forum.xentax.com/viewtopic.php?f=16&t=17076&p=142693#p142693https://forum.xentax.com/viewtopic.php? ... m3#p126282
The blender script from the second post is here: http://www.mediafire.com/file/ay28sw80vu3ui8v/import-castlevania-2010-12-25.rar/file