/usr/include/KF5/KF5KDEGames/ is in libkf5kdegames-dev 4:15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/KF5KDEGames/KDE/
/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
/usr/include/KF5/KF5KDEGames/highscore/
/usr/include/KF5/KF5KDEGames/highscore/khighscore.h
/usr/include/KF5/KF5KDEGames/highscore/kscoredialog.h
/usr/include/KF5/KF5KDEGames/kdegames_version.h
/usr/include/KF5/KF5KDEGames/kgameclock.h
/usr/include/KF5/KF5KDEGames/kgamepopupitem.h
/usr/include/KF5/KF5KDEGames/kgamerendereditem.h
/usr/include/KF5/KF5KDEGames/kgamerenderedobjectitem.h
/usr/include/KF5/KF5KDEGames/kgamerenderer.h
/usr/include/KF5/KF5KDEGames/kgamerendererclient.h
/usr/include/KF5/KF5KDEGames/kgaudioscene.h
/usr/include/KF5/KF5KDEGames/kgdeclarativeview.h
/usr/include/KF5/KF5KDEGames/kgdifficulty.h
/usr/include/KF5/KF5KDEGames/kgsound.h
/usr/include/KF5/KF5KDEGames/kgtheme.h
/usr/include/KF5/KF5KDEGames/kgthemeprovider.h
/usr/include/KF5/KF5KDEGames/kgthemeselector.h
/usr/include/KF5/KF5KDEGames/kstandardgameaction.h
/usr/include/KF5/KF5KDEGames/libkdegames_capabilities.h
/usr/include/KF5/KF5KDEGames/libkdegames_export.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kchatbase.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kchatbaseitemdelegate.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kchatbasemodel.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kgame.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kgamechat.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kgameerror.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kgameio.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kgamemessage.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kgamenetwork.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kgameproperty.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kgamepropertyhandler.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kgamesequence.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kgameversion.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kmessageclient.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kmessageio.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kmessageserver.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgame/kplayer.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgamecanvas.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgamedifficulty.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgamesvgdocument.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgametheme.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/kgamethemeselector.h
/usr/include/KF5/KF5KDEGames/libkdegamesprivate/libkdegamesprivate_export.h