Gnash is capable of reading up to SWF v9 files and opcodes, but primarily supports SWF v7, with better SWF v8 and v9 support under heavy development. Gnash includes initial parser support for SWF v8 and v9. Not all ActionScript 2 classes are implemented yet, but all of the most heavily used ones are. Many ActionScript 2 classes are partially implemented; there is support for all of the commonly used methods of each class.