Blam Engine Font File Editor
Font Packager is a tool to open and manipulate the font-related files of second-gen and third-gen blam engine games, as well as Halo Online and Halo 5 (the latter only uses font packages for a couple legacy functions).
Initial research by troymac1ure on Remnantmods http://www.remnantmods.com/forums/viewtopic.php?f=10&t=2270
Further researched and adapted by myself.