Here are all the 1024x768 wallpapers that were on Namco's Special Site for Xenosaga II.
Shion
Shion 2
KOS-MOS
KOS-MOS 2
chaos
Jr
MOMO
MOMO 2
Ziggy
Ziggy 2
Jin
URTV Trio
chaos and Canaan
Group
Screenshot Collage
Calendar May - chaos
Calendar June - Jin
Calendar July - Shion
Calendar August - Jr
Xenosaga Freaks - Group
Xenosaga Freaks - Neko MOMO
Xenosaga Freaks - Neko KOS-MOS