I loved Myst and Riven way back when, never got around to getting the later ones, now wonder if I and my iMacs (both heading for Social Security) have missed our chance. Figured would ask here before buying used versions and taking a chance. Both iMacs have been upgraded by previous users. I did check the Universal Binary Games list and links to macgamefiles for patches but not sure what applies in my case. One iMac is a G3 with PPC, has OS9 on one partition, OS 10.3 (Panther) on the other. Runs my Myst and Riven just fine. Other machine is a G5, still with the PPC, upgraded to OS 10.5 (Leopard). I have install disks for 10.4 (Tiger) but haven't seen any reason to add partition. Looks like I might be able to run Myst III on my G3, but no way to add the other two? While I'm at it, does anyone have suggestions for similar games that I could try? By "similar" I mean alternate worlds with lots of puzzle-solving rather than shoot-the-monster. I loved Shadowgate too. Thanks all.