I like quite a few Mac games from back when our family computer was a Mac and my only Amiga was a CD32. Now I play those Mac games on my Amiga 1200, like SimTower, Warcraft II, Theme Park, Prince of Persia II, Sim Farm, The Settlers II and more. The advantage of playing them on the Amiga is not only do they run at full speed (since there's no CPU emulation involved) but I can also multitask with several applications or games in AmigaOS at the same time. I'd recommend just getting a better Amiga than your A500 and use it to play games designed for both systems (and Atari ST too since that's another easy one for the Amiga to emulate).