Beta-Style Gman addon - Half-Life - ModDB

Gman re-skinned to look more like the Beta render of him. This includes changes to his face, briefcase, and suit.

Half-Life PS2 Review : r/HalfLife

Half-Life 2 Beta 2002 Style G-man addon - ModDB

Alright, now, which Half-Life mods should I play? It doesn't matter if said mods are 1,2, or Alyx. I heard Entropy : Zero is good, so I might start there. Thoughts?

Azure Sheep

Life's End mod for Half-Life - ModDB

Residual Life

Half Life 2 Beta Odell NPC (GMOD 12-13) addon - Garry's Mod - Mod DB

Steam Workshop::Half Life 1 // Third person

Half-Life 1: 2021 Community Patch : Various : Free Download, Borrow, and Streaming : Internet Archive

G-man render image - Half-Life 1: Guard Duty mod for Half-Life - ModDB