This hack is designed for new gameplay experience. New and better graphics are added, levels and enemies are edited, Character sprites are improved, difficulty reduced and new color palettes are added so please enjoy this hack!
Database match: Code Name - Viper (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 2E8A5923516FDBD110DD328661072E8D3C026601
File CRC32: 3F39F35C
ROM SHA-1: 220939191A48FB2CF3A73C8FD713A60AD2EE34DF
ROM CRC32: E2313813