Extinct Lifeform Hunt addon - Half-Life

The description says:

"This is a different type of single player map, there are no enemies, goals, puzzles, or even an ending. It mainly contains lifeforms that were cut from the final version of Half-Life, usually in groups of four. It is labeled a hunt in the title, but it is more like shooting sitting ducks. Most of the lifeforms don't have any artificial intelligence or sound effects. They don't fight back or even move much. The only exception is the alien bats that I included because I like the sound that they make. I also included some objects cut from Half-Life, some of them work, others don't. I also included some Gordon models just for fun. Some of the lifeforms used aren't fully developed, several alien creatures bleed red blood as well as some mechanical enemies. The rat creature even dies continually after you kill one. I made this level to get a better look at the characters and creatures that got cut from the game. I don't know much about them, just their names and a short description. You can check out what I know about them on my web site (URL listed above) on the Lifeforms that got cut page."

Installation:

Just put the EXTINCT.bsp foldter to "valve/maps" folder