Dive into a cascade of portals and headcrabs—prove you're more than just a silent scientist in Half-Life.
What catastrophic event does Gordon Freeman trigger by inserting an alien crystal into an anti-mass spectrometer?
Resonance Cascade
In Episode One, which new enemy—an infected Combine soldier known for pulling a grenade—made its debut?
Zombine
In Half-Life 2, which enemy results when the agile headcrab subtype latches onto a human host, notably encountered in Ravenholm?
Fast Zombie
Which physicist mentored Gordon Freeman during his MIT PhD and later recommended him for Black Mesa?
Isaac Kleiner
In the “Blast Pit” chapter, what deadly payload is fired from the silo to incinerate the three-headed tentacle creature?
Rocket