I have owned Half Life 2 since it came out and played it many times on my PC. I got bored and reloaded it on my newer computer, about a year old, and tried to play the game. It takes me to the steam website to download and play, and I don't understand why. I have played this game many times on my old computer's hard drive with no problems. I have also bought Duke Nukem Forever with the same results, I am not happy. My internet service in West TN is DSL 1.21/1.24 Mbps on a good day, there is no other service available. The steam help web site said do this and that to load it on the hard drive, it didn't work. The problem is probably with me, not exactly high tech, I am a senior gamer (66), but can follow simple instructions, which may need repeating. I would appreciate any help out there. And I am looking forward to the release of Serious Sam 3, I very much like the Serious Sam games!