Shotgun (Half-Life: Alyx) - Combine OverWiki, the original Half

Half Life Alyx Heavy Shotgun [Half-Life 2] [Mods]

Quantum Theory: 15 Years of Half-Life Speculation – LambdaGeneration

Submachine Gun (Half-Life) - Combine OverWiki, the original Half-Life wiki and Portal wiki

Half-Life:Alyx Beta - general thread

Combine Shotgun, Half-Life Wiki

Half-Life: Alyx (Video Game) - TV Tropes

Combine Shotgun, Half-Life Wiki

Steam Community :: Guide :: Way too detailed analysis of Combine gear in Alyx ( ports )

Combine Over - Half-Life 2: APC garage, Advisor Pod, All-Knowing Vortigaunt, Alyx Vance, Antlion, Antlion Guard, Antlion Hill, Antlion Soldier, Black Mesa, Breencast, Canals, Car battery

Shotgun (Half-Life 2) - Combine OverWiki, the original Half-Life wiki and Portal wiki

Combine (Half-Life) - Wikipedia

Half-Life (Video Game) - TV Tropes

Heavy Shotgun, Half-Life Wiki

Prerelease:Half-Life 2 (Windows) - The Cutting Room Floor

BlackOPS for Half-Life: An interesting mod with a hard-to-search name. – You Found a Secret Area!