The most differentiating feature, by far, is the Guard's protective carapace, which acts as a battering ram and a deadly weapon. In the Antlion hierarchy, Guards are responsible for protecting the hive.Īntlion Guards resemble a considerably larger and more powerful Antlion, with a similar skin colour and insectoid features. It is considerably larger than the common Antlion Soldier, as well as much stronger and more aggressive. The Antlion Guard is one of the various types of Antlion encountered in Half-Life 2.