The Tree is a plant-like organism found on the borderworld Xen that attacks living beings that move too close.
A brownish tree-like creature with no leaves or branches, the Tree somewhat resembles an upturned root and in that regard is similar to the Tentacle. Towering at around 13 to 16 ft tall (4 to 5 m), it has a fully mobile "trunk", and a large, hook-like appendage at the top, used for attacking nearby prey.
List of appearances
- Half-Life game files,