Question: When was the Half-Life first-person shooter game released by game development community MapCore? 
Sentence (from "MapCore"): With 100+ members part of the professional games industry working for the likes of Blizzard, Crytek, DICE, Gearbox Software, Rockstar Games, and Ubisoft, MapCore offers an opportunity for professionals and amateurs alike to socialise, learn, teach, and find talent.
Relevant evidence: No