Creatures of Half-Life

The following is a list of creatures in the Half-Life series. Half-Life is a science fiction first-person shooter computer game series which consists of two full games, two episodic games, and three third-party made expansions, as well as a number of demos featuring exclusive content. The series has been ongoing since 1998. The game's setting and characters have been influential within the gaming industry, with The New York Times writing that with the innovative storyline "Half-Life became the Citizen Kane of the genre". In Maximum PC's review of the original game the monster design was given a rating of "excellent". The complexity of the creatures progresses as the gamer advances through the game.

Creatures from Xen

Xen is a fictional world that houses numerous alien species in an alternate dimension set in Valve's Half-Life series. Note that these aliens are not originally from Xen, but use it as a border world to access other worlds in other dimensions, such as Earth.