The original Half-Life was almost abandoned by publisher Sierra On-Line before Valve threatened to reveal their unsavoury ...

The developers even created their own expanded version of the Alien planet, Xen, the final section of Half-Life 1 that was reportedly cut short by Valve. If you haven’t experienced Half-Life and ...

Xen is pivotal to the story of Half-Life. Black Mesa sent survey teams into this strange border world between dimensions to retrieve living alien specimens to experiment on, along with strange ...

He has also found references to various Xen creatures, such as swoopers, jellyfish, and gorillas, the latter of which was teased in Half-Life: Alyx's zoo level. McVickers ends his new video by ...

Look at this point on the graph in relation to the y-axis. You will see that the counts per minute have halved in two days. This means that it has a half-life of two days.