Viper Phase 1 (バイパーフェイズ1, Baipā Feizu Wan) is a 1995 scrolling shooter arcade game by Seibu Kaihatsu.

Earth's response is Operation Viper Phase 1: to combat the rebels using advanced space fighters built from downed enemy ships.

The soundtrack was released in 2005 as part of a superplay DVD set showing expert players playing through the game.

When unlocked, players have the option of changing the default Raiden DX soundtrack to implement music from Viper Phase 1.

[2] In North America, RePlay reported Viper Phase 1 was the sixth most-popular arcade game at the time.

[3] A critic for Next Generation praised the game's beautiful visuals and increasing level of difficulty, but added that "like all shooters, unless your hand-eye coordination is really solid, the fun will pass you right by".