castle-game-engine-doc 6.4+dfsg1-7 (s390x binary) in ubuntu hirsute

 Castle Game Engine is a set of LGPL licenced libraries that are intended to
 ease developing 3D games with FreePascal / Lazarus.
 .
 It provides an excellent support for the VRML / X3D 3D data format. Other 3D
 formats are also supported.
 .
 It features many advanced graphic effects and easy to use API on top of OpenGL.
 .
 This package contains documentation.