The extinct.zip file you have requested: Maps Levels Missions / Single Player / E to F Titles / Extinct Lifeform Hunt - 61.93kb is not available. Perhaps try browsing all files for the game Half-Life and upload any files you want to share or are missing. This is the only information we could locate:
Title:Extinct Lifeform Hunt
Author:Barry A. Bollinger - New Freedom, PA
Web Site :Barry's Half-Life Site - ht This is a different type of single player map.