/usr/include/KF5/KF5KDEGames/KDE/ is in libkf5kdegames-dev 4:15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/KF5KDEGames/KDE/KGameClock
/usr/include/KF5/KF5KDEGames/KDE/KGamePopupItem
/usr/include/KF5/KF5KDEGames/KDE/KGameRenderedItem
/usr/include/KF5/KF5KDEGames/KDE/KGameRenderedObjectItem
/usr/include/KF5/KF5KDEGames/KDE/KGameRenderer
/usr/include/KF5/KF5KDEGames/KDE/KGameRendererClient
/usr/include/KF5/KF5KDEGames/KDE/KHighscore
/usr/include/KF5/KF5KDEGames/KDE/KScoreDialog
/usr/include/KF5/KF5KDEGames/KDE/KStandardGameAction
/usr/include/KF5/KF5KDEGames/KDE/KgAudioScene
/usr/include/KF5/KF5KDEGames/KDE/KgDeclarativeView
/usr/include/KF5/KF5KDEGames/KDE/KgDifficulty
/usr/include/KF5/KF5KDEGames/KDE/KgSound
/usr/include/KF5/KF5KDEGames/KDE/KgTheme
/usr/include/KF5/KF5KDEGames/KDE/KgThemeProvider
/usr/include/KF5/KF5KDEGames/KDE/KgThemeSelector