7th Guest or Myst-Like games on Xbox?

Recently got an Xbox for Xmas and most games I don't like (like the fighting, violent, sports) and like games like 7th Gues and Myst. Any suggestions please? Also if I buy Pacman to download to Xbox and Xbox crashes then does that mean I have to re-buy Pacman and anything else I download to the Xbox? I can't find Pacman on a disc for the Xbox. Any help would be greatly appreciated! Thanks! :)