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 1: Guard Duty mod - ModDB

Azure Sheep

Steam Workshop::Every Original Half-Life Based Addon

Image 14 - Beta Aesthetics mod for Half-Life 2 - ModDB

Half-Life 2: LOCAL MOTIVE Definitive Edition - Full Walkthrough

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

Raising the Bar: Redux G-Man Model [Half-Life 2] [Mods]

Half-Life: Warrens mod - ModDB

Garry's Mod, Half-Life Mods Wiki

Half-Life: Uplink, Half-Life Wiki

Leon's Coastline to Atmosphere

HL2 Style Retexture for HL1 GMan Improved [Half-Life] [Mods]

Mods, Half-Life Wiki

Raising the Bar: Redux G-Man Model [Half-Life 2] [Mods]