Hi, recently I decided I wanted to play an old game, Titan Quest, but I lost the CD Key. However, my computer crashed after I bought it, and I got a new hard drive in addition to my old one. I don't remember why, but we reinstalled windows on the new hard drive and partitioned it. My old hard drive has the same windows and all of the files and games my new hard drive does up to the point were they were partitioned and I switched to using my new one. Until now, it has just sat there, I haven't ever used it but it is in my computer. I tried putting in the game CD, and it asked me if I wanted to install and there was no play option. So I tried loading the game from the old hard drive, and it worked, but it wouldn't let me play, it said I had invalid CD key. Since I couldn't find the CD key, I just tried copying the entire game with all my saves over to my new hard drive, but same thing happened.

So my question is, is there any way to play my game without buying a new one? It worked before I had the new hard drive, I don't know exactly what the difference is but my guess is it's something like the reason why my new hard drive windows is running instead of the old hard drive's, even though they're the same copy.