Enter "JPEARCE" as a name to unlock all robots, arenas, trophies, and 9,999,999 credits.
Highlight a locked arena that is directly next to a locked arena in free play mode. Press D-pad + X when moving towards the locked arena. If timed correctly, the previously locked arena will be playable.
At the main menu, select "War Zone" and choose any robot. After winning a match, the game will display your upcoming opponent. Press Select + A to play as your opponent against the robot that you last defeated.
Win the Robot Wars Championship (which also unlocks Chaos 2) to unlock the bonus Kilamanjaro level. Note: The Siberia level must already be unlocked.
Win the Russian Rampage Cup to unlock Behemoth.
Win the Robot Wars World Championship Tournament Cup to unlock Chaos 2.
Win the Rooftop Punishment (Japan) to unlock Diotoir.
Win The Hamburg Heavyweight Cup to unlock Firestorm.
Win the Flip Frenzy Tournament Cup as Chaos 2 to unlock Hypnodisc.
Win the Liberty Lightweight Cup in the North America Arena with a bought lightweight class robot. Mortis can now be bought for 40,000 credits.
Win the Scrapyard Challenge (Sao Paulo) to unlock Panic Attack.
Win the Alpha Viking (North Sea) to unlock Pussycat.
Win The Nerves Of Steel Cup to unlock Razor.
Win the Heavy Bomber (Siberia) to unlock Terrorhurtz.
Win the Robot Wars Championship Cup to unlock Thor.
Purchase cheap armor and weapons from the junkyard and add them to your spares. Save the game and return to the main menu. Then, return to the robot setup screen. Sell the armor and weapons to get full price for them.