All Working Gungrave Overdose Cheats - Playstation 2

Hidden options
Successfully complete the game as Beyond The Grave, Jyuji Kabane, and Rocketbillly Redcadillac to unlock the alternate costumes, sound test, stage select, movie viewer, and enemy rush options and bonuses.

The hidden options in the "Customize" menu are: "Invincible", "Unlimited Demolition", "All Explode", "Camera Angle", "High Speed", "Different Characters", and "Secret Character".

The hidden options in the "Extra" menu are: "Stage Select", "Boss Rush", "Enemy Rush", "Play Movie", "Play Conversations", and "Play Sound Effects".

Successfully complete the game under the hard difficulty setting to unlock Kick Ass difficulty mode.

Play as Rocketbilly Redcadillac
Successfully complete level 1 as Beyond The Grave.

Unlock Customize/Extra Options
These in-game achievements can be performed as an alternate way of unlocking customize/extra options in the US version and is mandatory in the Japanese version.

Warning: If a customize option is turned ON, no new features will be unlocked as long as it stays on, and your shield gauge will recover at a slower rate. (applies to the japanese version. US version may unlock new features with the shot/close range customizes on).

Customize: All Explode - 90+ Beat Skulls on All-Clear screen
Customize: Camera Angle - Clear game with no continues
Customize: Close Range Level 2 (1.5x damage) - 5 Hours of Gameplay, 50,000 shots fired
Customize: Close Range Level 3 (2x damage) - 20 Hours of Gameplay, 200,000 shots fired
Customize: Close Range Level 4 (3x damage) - 40 Hours of Gameplay, 400,000 shots fired
Customize: Different Characters - Clear game with all characters, 100+ Life Skulls on All-Clear screen
Customize: High Speed - 90+ Time Skulls on All-Clear screen
Customize: Invincible - Clear game on Hard or Kick Ass difficulty
Customize: Secret Character - 500,000 shots fired
Customize: Shot Level 2 (1.5x damage) - 3 Hours of Gameplay, 30,000 shots fired
Customize: Shot Level 3 (2x damage) - 10 Hours of Gameplay, 100,000 shots fired
Customize: Shot Level 4 (3x damage) - 30 Hours of Gameplay, 300,000 shots fired
Customize: Unlimited Demolition - Find all 50 in-game Nightow Angels (several hidden targets in each stage which needs to be fired upon 10 times with Secret Characters option ON)
Extra: Boss Rush - Clear game with all characters, 80+ Art Skulls on All-Clear screen
Extra: Enemy Rush - Clear game with all characters, 90+ Kill Skulls on All-Clear screen
Extra: Play Conversations - Clear game with all characters, 999 Beat Counts on Stage-Clear screen
Extra: Play Movie - Clear game with all characters, 100+ Art Points on Stage-Clear screen
Extra: Play Sound Effects - Clear game with all characters, 100% Life Remaining on Stage-Clear screen
Extra: Stage Select - Clear game with all characters

Bulldozer Overdose
At the end of level 3, you will get stuck in a large room with some goons, a pair of large rocket launchers, a pair of large ninjas, and a pair of bulldozers. This is no easy task. Strafe around all the commotion. Concentrate your fire on the large rocket launchers and the large ninjas. If you are playing as Grave and you have plenty of demolition shots, they should not last long. Just use the Gun Dance attack a few times. Keep shooting and earning more demolition shots to get rid of them if you run out. The problem is getting rid of the bulldozers. Run into a corner of the room. The bulldozers are too big to hit you in that small space and will stay stuck to each other in front of you, waiting for your punishment. If other goons show up, do not worry about them. Keep pressing [Square] without moving from your corner and they will soon stop emerging. Then, hold [Square] until your guns start to go aflame, and release to shoot some burst shots. Regular bullets do not work on the front of the bulldozers. When the front of the bulldozers explode, they are now vulnerable to any attack. Unleash your rage on them, without moving from your little corner.