The HalfLife series is filled with mysteries that, at this point, may never be solved. At the top of this list is the entity that follows the player across Black Mesa, and a Combine controlled Earth 20 years later.
This entity, known by many outside of this world, possessed incredible power and appeared to be a man playing a giant game of chess with the characters as his pawns. Always watching from a distance.

Who or what was he? Who were his employers? What made him an enemy of The Combine? Was he good or bad? And what was his ultimate plan? In this video, we explore HalfLife’s biggest mystery through the lore, story, and theories behind The GMan.

Timestamps
0:00 Introduction
01:35 The GMan & His Employers (Before HalfLife)
04:55 The Preparation for Xen (Before HalfLife)
08:50 The Resonance Cascade (HalfLife)
15:24 The Capture of Xen (HalfLife)
20:43 20 Years Later (HalfLife 2)
27:30 Loss of Control (HalfLife 2: Episode 1 & 2)
35:44 A New Hire (HalfLife: Alyx)
41:09 Pawns of The GMan
42:34 Theories
42:56 Theories (Future Gordon)
43:14 Theories (Employers are Valve)
44:11 Theories (Hatched Shu'ulathoi)
46:19 Legacy
48:49 Closing Thoughts

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HalfLife & Portal Lore Playlist:    • The Borealis | HalfLife Lore (Older ...  

Standard Sources
Game Manuals
HalfLife Series Playthrough Research
Portal Series Playthrough Research
HalfLife 2: Raising the Bar
HalfLife 2: Raising the Bar (Uncorrected Proof)
HalfLife 2 Prima Guide
HalfLife: Alyx Playthrough
Portal/ HalfLife Fandom
Dev Commentary
Old Valve Forums
Marc Laidlaw's Twitter
Marc Laidlaw Website
Breengrub Twitter
Reddit AMA (w/ HL: Alyx Developers)
Portal 2
Aperture Desk Job

AUDIO USED
HalfLife Alyx OST: Insubordinate Relocation
HalfLife 2 OST: Black Mesa Inbound
HalfLife 2 OST: Lab Practicum
Black Mesa OST: Catalyst
HalfLife 2 OST: Our Resurrected Teleport
Black Mesa OST: Resonance
HalfLife 2 OST: Nova Prospekt
HalfLife: Alyx OST: Severed From The Vortessence
HalfLife 2 OST: Triage At Dawn

#HalfLife #Lore #GMan