Successfully complete the game, then start a new game and enter "FIREBALL" as a name. If you entered the code correctly, the word "Magician" will appear on the option screen. All trading cards will be available under the DSS option.

Successfully complete "Magician" mode, then start a new game and enter "GRADIUS" as a name. If you entered the code correctly, the word "Fighter" will appear on the option screen. Nathan will be stronger and able to sustain more damage. There are no trading cards in this mode.

Successfully complete "Fighter" mode, then start a new game and enter "CROSSBOW" as a name. If you entered the code correctly, the word "Shooter" will appear on the option screen. Nathan will have a substantial number of hearts, extra sub-weapon damage, and can use the Homing Dagger sub-weapon in this mode.

Successfully complete "Shooter" mode, then start a new game and enter "DAGGER" as a name. If you entered the code correctly, the word "Thief" will appear on the option screen. Nathan stats will be reduced in both the value they start and increase with each level, except with LCK (Luck). Nathan will start with the value of 1600 LCK, and will gain an additional 160 LCK with each level (so at level 11 he will have 3200, and 4800 at 21, etc.).

When using the whip, hold down Attack to make it spin around in a circle. It will act like a shield, so you cannot get hit by small enemies around you. Note: You cannot move while doing this attack.

To defeat the Dragon Zombies easily, whenever you get hurt, jump up to the platform by the door where you entered the room and activate the Jupiter + Mandragora DSS combo to heal yourself. A fireball may hit you every once in a while, but it is very rare.

To defeat Death very easily, just activate the Jupiter + Manticore DSS combo. His sickles cannot hit you, and by this point in the game you will probably never run out of MP because this combo will use it slower than you restore it.

Note: You must have at least one action and attribute card. Equip an action and attribute card and press L (the DSS button). Immediately press Start, go into the DSS, and pick any card no matter if it is unknown or not. Note: This may require a few attempts. -From: ZCalic@ahaplanet.com

In the Battle Arena, equip a good DSS Summon Combo (for example, Uranus + Cockatrice). Press Start, select "Items", then "Use", and use a "Mind High" (not a "Mind Restore" -- however they can work, but you will need to be extremely fast). Immediately after exiting the pause menu, press the DSS button. When your character is done casting, press Down, Forward, Up, Attack. If done fast enough, you should have pulled off a summon in the Battle Arena.

The following is a list of enemies and locations that drop various DSS cards:

Action Cards

Mercury: Bone Head in Catacomb.
Venus: Slime in Catacomb, Abyss Corridor (hidden room), and Audience Room.
Jupiter: Heat Shade in Machine Tower.
Mars: Bloody Sword in Chapel Tower.
Diana: Man Eater in Underground Gallery.
Apollo: Arch Demon in Underground Storage.
Neptune: Ice Armor in Underground Waterway.
Saturn: Fallen Angel near the Battle Arena.
Uranus: Scary Candle in Golem Boss Room (defeat Camilla first).
Pluto: Trick Candle in Cerebus Boss Room (defeat Camilla first).

Attribute Cards

Salamander: Bomb skeleton in Catacomb.
Serpent: Earth Demon in Catacomb.
Mandragoras: Axe Armor in Abyss Corridor(in a hidden room), Audience Room.
Golem: Electric Skeleton in Audience Room.
Cockarice: Stone Armor in Machine Tower.
Manticore: Thunder Demon in Machine Tower.
Griffon: Skeleton Athletes in Audience Room (hidden room way to the right).
Thunderbird: Were-Panther in Chapel Tower.
Unicorn: White Armor in Battle Arena.
Black Dog: Devil Armor in Battle Arena.