At the title screen press X while holding up to bring up a cheats menu
031406 Gain 90000 storepoints (Note: Enter as many times needed.)
411411 Shows Monster's Move Name at the Bottom of the Screen
204935 Unlocks Everything
725830 Metal Godzilla
Submitted By unknown, Jackson Thomas Crawley
Press A and Up in the main menu
031406 - Add 90000 store points
0829XX - Set Day (Note: xx is day, 0-based. So, entering 082910 would take you to Day 11 of the save game youÂ’re currently working on. This only works after yo
411411 - Show Monster Moves (Note: This is a text display of move names, underneath HUD in game.)
787321 - Toggle Version Number
204935 - Unlock All
To unlock obsidius you need to unlock the mutant faction. Then buy Obsidius for 20,000 points
Submitted By patrick
Baragon - Free Baragon from the crystals in "A Friend in Need" at Monster Island as an Alien. Defeat him in the "Baragon" stage and buy him for 15,000 points.
Biollante - Be an Earth Defender and play "Rumble in the Surf" in Tokyo. Destroy the building with vines and defeat Biollante later on and buy her for 30,000 pts.
Krystalak - Play "Terran Mind-Control" in New York as an Alien. Destroy the large crystal in crater and nine days later defeat Krystalak and buy him for 20,000 pts.
Mecha-King Ghidorah - Play "Invasion" as an Earth Defender in San Francisco and defeat Ghidorah. Play "M.K.G" and defeat Mecha Ghidorah and buy him for 50,000 points.
Megagurius - Be an ED and play "Enter General Gyozen" at London. Destroy three teal crystals. Return near the end and defeat Megaguirus. Buy her for 20,000 pts.
Obsidius - Play a mech from GDF and play "Big Trouble" at Seattle. Destroy three cone crystals. Defeat Obsidius later and buy him for 20,000 pts.
SpaceGodzilla - Play as a Mutant and obtain four Power Surges and beat "Tyrant" at the end of the game. SpaceGodzilla will be added to the shop and will cost 100,000.
Titanosaurus - Use a mech from GDF and play "Soloist" at Sydney. Destroy three circular ice structures. Return later and defeat the dinosaur. Buy him for 25,000 pts.
Varan - Play as an Alien and destroy the crystals on the Mothership in "On the Mothership". Return to the level and defeat Varan and buy him for 30,000 pts.
Submitted By Yonatan
Play through single player as Aliens and when you get to the level "Invasion" instead of defeating the enemies destroy the mothership. This will unlock the mothership level for purchase in the store.
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