HLLib is a package library for Half-Life that abstracts several package formats and provides a simple interface for all of them. HLLib is written in native C++ but exposes both a C and C++ interface which can be used in any C or C++ application (additional languages may also use the library with standard C imports). HLLib works natively in both Windows and Linux. BSP, GCF, NCF, PAK, VPK, WAD, XZP and uncompressed ZIP package formats are supported.