The type of (PC, Xbox) games I have enjoyed and their general genealogy are as follows. I wish I had my Atari 800 or 1200 ... oh well. I first got hooked on Unreal Tournament when that was the whole name (and all the versions up to present). From there I branched out to other shooters like the original Half Life (and all the versions up to present). There were a lot of these around like Doom and Castle Wolfenstein that were iffy to me. Eventually my teen age Son got me to playing Left 4 Dead (an...