Code Name: Viper

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 This game has unused graphics. 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.

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.

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.

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.

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

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