/usr/lib/libkdegamesprivate.so is in libkdegames-dev 4:4.14.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libkdegamesprivate.so.1abi1
/usr/lib/libkdegamesprivate.so.1abi1