Official Documentation
vpp - Packfile format for SR4
asm - Asm file format
vpp, asm - asm and vpp file formats
peg - Peg file format
czh, czn - SR3 zone file format
grid - grid_pc file format
vpp, v_file_header, czh, czn - Kinzies-Toy-Box/file_formats.md
smesh, cmesh, lmesh, matlib - Crunched...