packpdb2.exe can be used to create (aka 'pack') data files into a Game Database, to extract (aka 'unpack') the contents of a Game Database, and to view the contents of a Game Database without extracting them.
packpdb2 usage (creating/packing):
packpdb2 -p <CRID> <pdb file> [filespec]
Pack [filespec] into <pdb file> with creator id <CRID>. Optional [filespec] defaults to .\*.*
packpdb2 usage (extracting/unpacking):
packpdb2 -p <CRID> <pdb file> [filespec]
Unpacks files from <pdb file>. Optional [filespec] defaults to .\*.*
packpdb2 usage (viewing):
packpdb2 -v <pdb file>
View contents of <pdb file>