QDA file extension - Quadruple D archive file
What is qda file? How to open qda files?
File type specification:
Quadruple D (Do the DirectDraw with Delphi) is a DirectX library for Delphi developed by a Japanese programmer named SANDMAN. It has become the de-facto graphics library for Japanese PC games written in Delphi.
In addition to DirectX routines, the library also includes the Quadruple D Archiver tool, and contains functions to read files from the QDA archives created by the archiver.