I think the innerchild in me was immediately attracted to the words "puzzle" and "games" in the title of this post. I picked the interactive game "Mastermind" because I am most familiar with that game and thought I had a pretty good chance at beating it. Plus, we're learning a little about probability in my math class right now so I was hoping to apply whatever I learned about probability to the game. I found the game hard at first because of all the possible comibinations. Although I did not beat the computer, I had fun trying!!
I think this is a great way to "disguise" mathematical concepts into something fun so that students with math anxiety or is doubtful of his/her math skills can "play along" without being intimidated!