Yes, they both do. The Saturn's cart slot has no region protection.dave4shmups wrote:do you know for certain if either the ST-Key or the Action Replay will let you play American games on a Japanese Saturn?
http://www.ncsxshop.com/cgi-bin/shop/ST-01.html
I included the last sentence because you'll want to look into spending the extra money on a PAR 4-in-1 if you want to play those RAM cart games. I've heard that the save memory on the PARs is less than reliable.The ST-Key allows the use of any NTSC or PAL Saturn game on any version of the console, which includes Europe, Japan, and the United States. Please note that the ST-Key does not have any additional functions or features and is only to be used as a territory converter.