Viper Phase 1
| Viper Phase 1 | |
|---|---|
| Developer(s) | Seibu Kaihatsu |
| Publisher(s) | Fabtek (US) Tuning Electronic (DE) |
| Series | Raiden |
| Release | May 1995 (Old Version) August 1995 (New Version) |
| Genre(s) | Vertically scrolling shooter |
| Mode(s) | 1-2 player simultaneous |
| Arcade system | Seibu SPI System |
Viper Phase 1 (バイパーフェイズ1, Baipā Feizu Wan) is a 1995 vertical-scrolling shooter arcade game developed and published by Seibu Kaihatsu. It is a spin-off in the Raiden series set in space.