Boiled Netch Buckler

Boiled Netch Shield

Iron Tower Shield

Lord's Mail

Xen flora/fauna

Colovian Hat

Metrocops

Antlion Worker

Alien medic

Antlions

Sluagh

Bullsquid (HALF-LIFE)

Cockertrice

Hunter (Half-Life 2 redesign fanart)

Houndeye