nptools is a collection of utilities for manipulating nitroplus game files. To build this, you will need libnpa, unshield, zlib and boost.
npaextract: Extracts .npa achieve contents.
npapack: Creates .npa achieve from specified directory.
nsbparse: Decompiles .nsb script file into a raw human-readble format.
nsbparse2: Decompiles .nsb script file into a high level language.
nsbcompile2: Compiles .nss script file into .nsb format.
npinstall: Installs a Nitroplus game.
npcrypt: Decrypts a Steins;Gate save file
npfparse: Dumps variables from Steins;Gate save file