The
alien world in
Half-Life. Seems to consist of
floating islands linked by
teleporters. The
sky is very
strange and there is less
gravity. You meet
Gonarch and the
Nihilanth here. The world of Xen seems to rely on
biological technology, such as living
lights and
elevators.
Some theories on Xen:
1.) The
G-Man refers to it as a
border world... Implying that there is
something on the other side of the
border?
2.) Could it be a
gas giant? The
lack of real
land and the weird
skies would
suggest this.