The Gonarch can only be damaged by attacking the large sack under its shell. The acid blob will poison you if it hits you. Be sure to take cover from it.
| NPCs | ||
|---|---|---|
| Black Mesa | Scientist · Security Guard | |
| HECU | Grunt · Engineer · Medic · Sergeant | |
| Black Ops | Female Assassin · Male Assassin · Bodyguard | |
| Aliens | Alien Controller · Alien Grunt · Alien Slave ·
Baby Gargantua · Baby Headcrab · Baby Voltigore · Barnacle · Bullsquid · Chumtoad · Gargantua · Gene Worm · Gonarch · Gonome · Headcrab · Houndeye · Ichthyosaur · Kingpin · Leech · Nihilanth · Panthereye · Pit Drone · Pit Worm · Shock Roach · Shock Trooper · Snark · Stukabat · Tentacle · Voltigore · Xen Commander · Zombie | |
| Machines | Large Mounted Turret · Small Mounted Turret · Sentry Turret · Robot Grunt | |
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