У вашего броузера проблема в совместимости с HTML5
portal 2 a fun game in gmod wow... i didn't get the space core mod crap
portal download https://steamcommunity.com/sharedfiles/filedetails/?id=1581533176&searchtext=the+aperture
Map download https://steamcommunity.com/sharedfiles/filedetails/?id=1298486841&searchtext=portal