When you have a game like Half-Life and all the detail that could be included in it (that you get from playing the games and reading background on it on your own) it's almost impossible to convey that to film and not butcher it.
Morgan Freeman should play gordan and Chris Rock should play Eli Vance. Chuck Norris should play Dog. Bob Saget should play gman. Dr.Phil should play breen and so on.
