I've been a PC gamer back since the early 90's. I was there when Wolfenstein, Doom, Descent, and Quake dominated the FPS genre, and I loved those games until half-life came along. Before I could get a copy of the full game, I played half-life: uplink, which was the demo. I was mesmerized by the immersion, action, scares, and humor evident in even that brief demo. Once I played The full version, I was hooked. I played Half-Life, Opposing Force, Blueshift, and Counterstrike for a long time after they came out. When I heard Half-Life 2 was coming out, I was excited, but my computer was too old to play those games, so I was left out of loop for a while. I played snippets of the game at a friend's place, but it wasn't the same as taking my time, and really appreciating a game on my own time, under my own conditions. Last year, i was able to buy a new computer and the first 2 games I purchased were Crysis and The Orange Box. Half-Life 2, episode 1, episode 2, and portal were all that I expected and more. I played them through right away, sometimes spending countless hours playing in a row, not knowing how long I had really spent playing. Now that I've conveyed my life's story, I'll answer the original question. Half-Life 2 is the best game series ever made because of the experience the player has playing it. The story, action, humour, weapons, characters, and music all converge to create a deeply enjoyable experience for many people. With that said, the half-life series is not perfect. There were some bugs in the original that infuriated me (getting stuck in a wall during an autosave) and certain areas were disproportionately difficult (the zen stage.) I still can't find a way to disable auto weapon selection, which was a gripe of mine from the original half life right through the series to the latest: episode 2. Some may have found the visuals to be lacking compared to other games of the same eras, such as Unreal with the original Half life, to Crysis with episode 2, but I find they hold up fine. To finish up, I think that the half life series has been the most enjoyable video gaming moments I've ever had, besting Crysis, Bioshock and others, if only by a few degrees. Valve, keep up the good work, and your millions of fans are waiting in the wings for Episode 3 and Portal 2. Long live the One FreeMan.