/usr/share/games/xpilot-ng/maps/ is in xpilot-ng-server 1:4.7.3-2ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/games/xpilot-ng/maps/blood-music.xp2
/usr/share/games/xpilot-ng/maps/circle2.xp2
/usr/share/games/xpilot-ng/maps/dodgers-legacy.xp2
/usr/share/games/xpilot-ng/maps/dodgers-robots.xp2
/usr/share/games/xpilot-ng/maps/dragon-1.0.xp2
/usr/share/games/xpilot-ng/maps/ndh.xp2
/usr/share/games/xpilot-ng/maps/ndh.xpd
/usr/share/games/xpilot-ng/maps/polybloods.xp2
/usr/share/games/xpilot-ng/maps/sadistic_bastard_v2.xp2
/usr/share/games/xpilot-ng/maps/spaceball.xp2
/usr/share/games/xpilot-ng/maps/teamcup.xp
/usr/share/games/xpilot-ng/maps/tourmination.xp2