Complete the game to unlock the "Card Movies" option in the Deck Editor and Metal Gear REX and MGS 4 cards in your deck. Continue playing past the first part of stage 3 after completing the game once to unlock the MGS3: Subsistence pack. Beat the game two times to unlock the Metal Gear RAY card, MGS Integral pack, MGS2 Substance pack, and Chronicle Unlimited.
Use the Analog-stick to scroll up and down. Press L to change the color of the "Metal Gear Ac!d 2" text to black and remove the black pixel effect. Press R to zoom in on the title screen. Upon zooming in you will have the freedom to "scroll" the Analog-stick.
Unlock the following bonuses by performing the corresponding tasks:
BONUS - HOW TO UNLOCK EZ Gun - Complete Arena mode half way on the Easy difficulty setting Stealth - Complete Arena mode half way on the Normal difficulty setting Running Man - Complete Arena mode half way on the Hard difficulty setting G36C - Complete Arena mode half way on the Extreme difficulty setting
Upgrade the following cards to receive different ones. Note: All upgraded cards will count as a different card than the original:
Strand will upgrade to Critical Shot. Equipment Lv.2 will upgrade to Equipment Lv.3. Bandage will upgrade to Syptic +. McDonnell Miller will upgrade to Liquid Snake. Gray Fox will upgrade to Cyborg Ninja. Ocelot will upgrade to Revolver Ocelot. Metal Gear D Revised will upgrade to Metal Gear Mk-II. Django will upgrade to Sabata. Otenko Sama will upgrade to Otenko Sama +. Naked Snake will upgrade to Big Boss.