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Contra 4

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Title Screen

Contra 4

Also known as: Contra: Dual Spirits (JP)
Developer: WayForward Technologies
Publisher: Konami
Platform: Nintendo DS
Released in JP: March 13, 2008
Released in US: November 13, 2007

GraphicsIcon.png This game has unused graphics.
DebugIcon.png This game has debugging material.

ProtoIcon.png This game has a prototype article

To do:
regional differences.source:https://contrapedia.wordpress.com/contra-4-regional-differences/

Contra 4 returned the series to a handheld platform after 16 years, celebrating 20 years of the Contra franchise along with being a direct sequel to Contra III: The Alien Wars. Its Japanese subtitle even has a cutesy "DS" acronym like Advance Wars: Dual Strike.

Anything else you wanted? Sorry, no European version for you.

To do:
There are demo leftovers, check em out.


Read about prototype versions of this game that have been released or dumped.
Prototype Info

Debug Menu

To do:
Document the menu.
US Japan
Contra 4 debug.png Contra 4 debug-jp.png

By using Action Replay code 221C???? 00000006 where ???? is D850 (US) or E000 (JP) and restarting the game, a debug menu becomes accessible. This menu is very similar to the one in the leaked European prototype.

NOTE: Turn the cheat off before entering any of the options.

The most interesting selection in the debug menu is the GYM entry, a very preliminary stage featuring unused content. It is the only entry that sends you to a part of the game not accessible in regular play. Some interesting features (note that the Top Screen on the DS is actually blank in-game):


A different "Meat Puppet" enemy variant and a footsoldier with an incorrect palette.


Numerous interesting tidbits. A different gun turret; strangely, a piece of the weapon box tile from NES Contra; a different "Proboterror" enemy.


Winged angel enemies that shoot upwards.


A flame thrower enemy. One would imagine these guys would have been in the Laboratory stage (in the lab section), or in the start of the final level.

Unused Graphics

Present in the game are two graphic files which are most likely leftovers from early testing.


To do:
Assemble it.
Contra 4 Test Level 1.PNG

What appears to be early placeholder sprites from Operation C, as well as somewhat garbled soldier and player sprites. The background at the bottom is also an early cave background.



A simple image placeholder.