Here's a headcanon: All the HECU grunts apart from Adrian look like the original grunt model and Adrian is the only one with the high definition look. : r/HalfLife
Steam Workshop::Half-Life Robot Grunt
Desert grunt [Half-Life] [Mods]
Restored Human Grunt addon - Half-Life - Mod DB
Hazardous Environment Combat Unit | Half-Life Wiki | Fandom
Half-Life Alyx Combine Grunt by HailHazmat on DeviantArt