As a game collector, there are many games I enjoy that were never released in the U.S. I have mostly bought Japanese imports because I know the tv signal is the same NTSC. Are there any home game systems that will play European or PAL region games without any modification? I have bought C64 cassettes, and CD-i games that were European, as well as many portable game system games that work with no problem. Am I missing out on other games that play fine on U.S. systems?