▁comment ary ▁is ▁changed ▁slightly ▁to ▁reflect ▁this . ▁For ▁example , ▁Val ve ▁president ▁G abe ▁New ell ▁would ▁describe ▁the ▁effects ▁that ▁are ▁seen ▁differently . ▁ ▁Comment ary ▁system ▁ ▁In ▁addition ▁to ▁a ▁show case ▁for ▁visual ▁improvements , ▁Lost ▁Coast ▁acted ▁as ▁a ▁test bed ▁for ▁Val ve ' s ▁comment ary ▁system . ▁When ▁the ▁feature ▁is ▁enabled , ▁additional ▁items ▁appear ▁in ▁the ▁game ▁that ▁can ▁be ▁interact ed ▁with ▁to ▁play ▁audio ▁comment ary . ▁Each ▁audio ▁piece ▁ranges ▁from ▁ten ▁seconds ▁to ▁a ▁minute ▁of ▁comment ary . ▁Play ers ▁hear ▁the ▁developers ▁talk ▁about ▁what ▁the ▁player ▁is ▁seeing , ▁what ▁is ▁happening , ▁why ▁they ▁made ▁certain ▁dec isions , ▁and ▁what ▁kinds ▁of ▁challeng es ▁they ▁faced . ▁Comment ary ▁tracks ▁are ▁represented ▁by ▁floating ▁speech ▁b ub bles ▁called ▁comment ary ▁nodes . ▁Val ve ▁intended ▁for ▁players ▁to ▁first ▁play ▁the ▁level ▁with ▁comment ary ▁disabled , ▁and ▁after ▁comple ting ▁the ▁level , ▁play ▁it ▁again ▁with ▁comment ary ▁enabled , ▁learning ▁about ▁each ▁new ▁stage ▁as ▁they ▁progress . ▁The ▁company ▁has ▁since ▁made ▁the ▁comment ary ▁system ▁standard ▁in ▁all ▁its ▁later ▁video ▁games . ▁ ▁Release ▁and ▁reception ▁Lost ▁Coast ▁was ▁released ▁on ▁October ▁ 2 7 , ▁ 2 0 0 5 , ▁as ▁a ▁free ▁download ▁from ▁Val ve ' s ▁Ste am ▁content ▁delivery ▁service ▁to ▁anyone ▁who ▁purchased ▁Half - Life ▁ 2 . ▁People ▁who ▁received ▁Half - Life ▁