Protoss Colossus

Protoss Colossus is an alien that appears in Fleeing the Complex (The Betrayed/International Rescue Operative) after Henry Stickmin unsuccessfully tries to use the Teleporter to escape The Wall. This creature easily kills the Zealots, and Henry along with them.

Trivia

 * The Colossus is a reference to the Video Game Starcraft 2, being a Protoss.