How Are the Portal and Half-life Games Connected?

Which is Safer? Black Mesa or Aperture Science?

Half-Life & Portal - The Complete Story (What You Need to Know!)

The History of Source Games

POSTAL: Special Delivery & Super POSTAL - From Pure Edge to Comedy | EDC

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The Orange Box... 10 Years Later

The Removed & Lost Easter Eggs of Portal 2

Firearms Expert Reacts To Half-Life Franchise Guns

I Fully Completed EVERY Half-Life + Portal Game...

POSTAL - The Darkest Game Ever Made | EDC

The Combined Timeline | COMPLETE Half-Life & Portal Story & Lore

Half Life Alyx: The Story Explained

Portal: A History of Aperture (Timeline and Lore)

Half-Life: 25th Anniversary Documentary

Halo CE's The Library Is NOT a Bad Level

Why Everyone Loves the Half-Life 2 Beta

What has Valve been up to? - The Lost Projects

Oh, This is Why People Like Portal 2

Quake II: Once Controversial, Now a Beloved Sequel | EDC

The Right Man In The Wrong Place | Dr. Gordon Freeman | FULL Half-Life Lore