UMD Recognition
Cheats are available for GX Tag Force 3 and 5D's Tag Force 4 that will allow you to get your hands on all three of the Egyptian god cards--the Winged Dragon of Ra, Slifer the Sky Dragon and Obelisk the Tormentor--in addition to other cards. To obtain these cards, you will need at least one of the Tag Force games preceding the game for which you want to unlock god cards.
In order to get the god cards, perform a Universal Media Disk (UMD) recognition from Tag Force 3 or 4, which will allow you to scan your PSP's memory for the cards in previous games. Select one of your game's prequels in order to access the cards associated with that game.
GX Tag Force 3
Performing a UMD recognition from Tag Force 3, scanning the original Tag Force, will get you Obelisk the Tormentor card. Scanning Tag Force 2, on the other hand, will unlock the other two Egyptian gods, the Winged Dragon of Ra and Slifer the Sky Dragon, in addition to the Dark Bribe, Plasma Warrior Eitom and Versago the Destroyer.
5D's Tag Force 4
If you are performing a UMD recognition from Tag Force 4, scanning the first Tag Force game will unlock the Winged Dragon of Ra card as well as the Philosopher's Stone, Crystal Skull, Jinzo, and Red-Eyes Black Dragon cards. Scanning Tag Force 2 will unlock the Slifer the Sky Dragon card as well as the Power Wall, Dark Magician, Dark Magician Girl, Ashoka Pillar, and Akiza Izinski cards.
Scan Tag Force 3 to unlock the Obelisk the Tormentor card as well as the Blue-Eyes White Dragon (a powerful card in its own right), Berserker Soul, Miracle Contact and Cabrera Stone cards.
GX Tag Force and GX Tag Force 2
While the Egyptian god cards are not available for GX Tag Force and GX Tag Force 2 the three Sacred Beasts or Phantom Demons, which are essentially the dark counterparts to the Egyptian god cards, are available and all you have to do to access them is enter a cheat code into the password machine. The passwords are the same for both games.
Use the cheat code ̶0;06007213̶1; to get Uria, Lord of Sealing Flames; ̶0;32491822̶1; to get Hamon, Lord of Striking Thunder; or ̶0;69890967̶1; to get Raviel, Lord of Phantasms.