Balcmeg was one of the Orcs killed in the Fall of Gondolin by Tuor, according to The Book of Lost Tales. Tolkien wrote the story of the fall of the city in 1917 and never fully revised it, and Balcmeg does not appear in the published Silmarillion, although he was obviously of some importance, for only three orcs out of many that Tuor slew in Gondolin were named.