How Are the Portal and Half-life Games Connected?
25:07
Which is Safer? Black Mesa or Aperture Science?
33:54
Half-Life & Portal - The Complete Story (What You Need to Know!)
16:11
Paranoia in Valve Games
23:25
The Darker SECRET Experiments of Aperture | Test Shaft 09 | FULL Portal Lore
1:11:38
The Orange Box... 10 Years Later
1:05:40
I Fully Completed EVERY Half-Life + Portal Game...
2:01:18
Half-Life 2: 20th Anniversary Documentary
37:08