Description: The mod XET is singleplayer and takes you on the roll of XET member Bill Freeman. XET is supposed to be the survey team mentioned late in the game and in parts of Blue-Shift. You will visit new parts of Black Mesa and old parts of it; you will, of course, also visit Xen. It will have new monsters, new weapons, and new maps. Story: Hmmmm... It wasn't always like this, humans building colonies on Xen, at first it was a lot different... It all started with the top secret government facility called Black Mesa. Those scientists then stumbled upon teleportation technology and sadly, discovered Xen. At first it all went well with the founding of the Xen Exploration Team, or XET as we know it as, but after awhile the team got a little overconfident and then started to gather specimens a little to close to the alien borders. They say that during the invasion of Earth, all of the XET members were killed in the chaos. I, Bill Freeman, former XET member and colonist of Xen was...
Chumtoads are one of the oldest lifeforms on Xen.
They resemble frogs, but have spines and one large
eye. They tend to live in large groups and pose no
serious threat. They attack by throwing themselves
spine-first at any enemy. Some will even go into
an adreniline fueled craze. When this happens they
behave like Snarks and hunt down any potential
prey, including their own kind.