After browsing through this forum for a bit, I'm surprised that nobody has yet discussed the possibility of modifying 3DS save games created by the Gateway (well, 'cept for some related chat in 1 other thread). I'm not exactly sure how the 3DS save games are encrypted, nor am I certain how the .sav files created by Gateway are similar to save games extracted previously from the R4i dongle. Nevertheless, to get the process started, I've created 4 saves using Culdcept 3DS (JPN), for those interested (see attachment). The first 3 are after 3 consecutive battles, where I've gained around 15 cards (~12 new) each time; saves 4 is taken after trading 3 cards (giant rat, new quantity 1; wolf, new quantity 2; shield, new quantity 1) and obtaining 2 new cards in return. So far, I am unable to ascertain how the save structure changes between saves. It seems that there are numerous blocks of 100-500 bytes different between saves, though in its original (encrypted?) form there's a patch of over 10000 bytes common. I've also tried using 3DS Save De/Encrypter 1.5a, which seems to have created more differences. I also suspect that the decrypting algorithm used is incompatible with Gateway saves, since after decrypting the files, there are numerous blocks of 511 bytes different, followed by 1 byte same, and repeats. This pattern suggests block-cyphered data, which is odd since it's suppose to be decrypted. Anyone else interested?