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In the chapter "Forget About Freeman", there are Snark Eggs that hang in the air with the use of webbing. Xen forces have learned to use Snarks to their advantage. It is not uncommon for a player to be seen running through the map while being chased by a pack of Snarks. In multiplayer deathmatch games, Snarks provide a useful way of distracting other players (particularly multiple players), facilitating escape or a means of a more leisurely kill.
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If there is nothing for them to attack, they will turn around and attack Gordon instead (which is why the player should always be sure to throw them from a higher vantage point). Once thrown, the Snark's twenty-second "attack mode" begins, and it will immediately charge at the nearest living thing and attack it. While held, Snarks have an unlimited lifespan, but still show aggressive tendencies (as two comical idle animations show one animation with the Snark struggling in Gordon's hand, and the other with it snapping at Gordon as he teases it with his finger). The player can obtain an egg sack containing 5 Snarks which can be used as weapons. The Snark will react to tapping on the glass and being fed. In Half-Life: Alyx, Alyx Vance is shown to own a pet Snark at her hideout which she keeps in a large glass jar. The Snark emits a high-pitched squeak with each bite, which gets higher and higher in pitch the longer it stays in its "attack mode" before finally exploding. To add insult to injury, a snark will explode about twenty seconds after they start attacking, spraying acid everywhere. These bites are powerful, doing as much as 10 points of damage each and easily crippling the player if they are not careful. When their nest is threatened, Snarks will leap out and charge at their intruder, bouncing around madly and biting with their sharp beaks. The fleshy nests themselves are about the size and shape of a road sign, and dark green with translucent red pods and four claw-like branches on each corner. They are social and highly territorial, making nests and protecting them at all costs. Snarks are small, beetle-like creatures with four legs, a single bright glowing green eye, and a thick, dark red, segmented shell. 6.1 Dynamic Environmental Interaction demonstration room.
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