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Code Name: Viper

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Title Screen

Code Name: Viper

Also known as: Ningen Heiki: Dead Fox (JP)
Developers: Arc System Works, Capcom
Publisher: Capcom
Platform: NES
Released in JP: February 23, 1990
Released in US: March 1990

GraphicsIcon.png This game has unused graphics.
RegionIcon.png This game has regional differences.

Code Name: Viper is a shameless (but still okay) Rolling Thunder clone by Capcom.

Unused Graphics


An unused "OK" word balloon. Unlike the ones that are used, its graphics are not stored in reverse.

Code Name - Viper-unused hand.png

There are three different types of hands drawn for the level complete screen. The first two levels have a picture with crossed fingers, and the next three with a hand open and stretched out and the last one has an angry fist. There is an unused fourth type of hand still present in the CHR data as well as sprite layout in the PRG ROM.

Code Name - Viper-hand1 anim.gif Code Name - Viper-hand0 anim.gif

Also, the first two hands were meant to be animated. The CHR data for one extra frame still exist in the ROM. However, there are no sprite layouts corresponding to it, as well as no any animation code has ever written to it. Here are two pictures of how they look.

Code Name - Viper-unused cap.png

Among the hands sprite graphics, there an unused sprite of the uniform cap. No sprite layouts for it is left in the final version, not when it should be displayed.

Code Name - Viper-unused heli.png

The map sprites has additional animation for landing helicopter, unused in the final game, as well as some unknown odd sprite to the left.

Code Name - Viper-unused intro.png

The tilemap resource for some early unused version of the intro briefing still present in the ROM. In the final version, they used the text message instead. It seems on the early stages, the intro sequence should've been completely different, similar to other screens like map or level complete briefing.

Regional Differences

Title Screen

The title screens are different.

Japan US
Ningen Heiki - Dead Fox-title.png Nescnviper-title.png