This game was developed by the same developers that created the first three Spyro The Dragon games for the PS1.
The WAD files for this game are compressed and/or do not show up on windows explorer (probably due to the size of the file(s)). To see what is in the files you must dump the memory when the game is running.
ratbfaces.jpg

The vertexes are correct but the faces are not as they need to be
rendered as an unknown implicit function of the vertexes (possible "Fans" where subsquent vertexes are attached to a central vertex similar to what might be used in such games as like Champions Return to Arms)
The meshes are made up of submeshes that have a format slightly different then most PS2 or computer games.
........
The vertex subsection is composed of arrays that are 16bytes in length, however there are 10bytes of each array that are not vertexes and contain different data sections that appear to be independent of the vertexes:
Mesh:
.....
Bone weight section
.....
SubMeshes:
Subsections:
TextureUV subsection (4ByteSignedIntegerCoord(U,V)
.....
VertexSubsection inter-spaced with unknown section (2ByteSignedIntegerVertexes(X,Y,Z)+10Byte Context Specific Sections
1ByteColorMappingsSubsection+80
.....