Viper Phase 1 - Revision history

CIT Seven Force at 14:11, 2 September 2026

2026-09-02T14:11:06Z

CIT Seven Force at 20:46, 26 August 2026

2026-08-26T20:46:44Z

CIT Seven Force at 20:31, 26 August 2026

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CIT Seven Force at 20:19, 26 August 2026

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CIT Seven Force at 15:02, 26 August 2026

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CIT Seven Force at 14:51, 26 August 2026

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CIT Seven Force at 14:50, 26 August 2026

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CIT Seven Force at 14:48, 26 August 2026

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CIT Seven Force at 14:43, 26 August 2026

2026-08-26T14:43:28Z

CIT Seven Force at 14:42, 26 August 2026

2026-08-26T14:42:44Z

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 |-
 |}
 === Items ===
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 # Primary info provided by [[User:CIT Seven Force|CIT Seven Force]]
 # AI was used to analyze the game code and confirm score calculations, enemy spawn routines, and the rank system
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 * The player 1 ship ''Judge Spear'' and player 2 ship ''Blue Javelin'' are selectable crafts in the ''Raiden Fighters'' series of games.
 * In the Sony PlayStation release of ''Raiden DX'', players can unlock the option to swap the standard soundtrack with music from Viper Phase 1.
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 The ratio between small and large medals that are dropped by bonus pods is random.
 </br>
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 ===== Completion Bonus =====
-If the missile in the final mission stopped, thereby achieving the good ending, 1,000,000 points are awarded. If the player fails to do so only 100,000 points are awarded.
+If the missile in the final mission is stopped, thereby achieving the good ending, 1,000,000 points are awarded. If the player fails to do so only 100,000 points are awarded.
 ===== Bomb Bonus =====
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 * When playing for score, prioritize achieving a 100% enemy destruction rate and a clearing the game using as few lives and bombs as possible, as this will have the greatest effect on score.
 * Use screen sealing to your advantage: moving to the far right or left side of the screen so that enemies on the opposite side are no longer visible onscreen will prevent them from firing shots.
-* It is neither necessary nor recommended to control rank.
+* It is not necessary to control rank.
 === Enemy Spawn Behavior ===
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 Destroying the silos in the opening section of the stage will cause many medals to scatter out. Destroying all of the silos will yield a secret bonus of 40,000 points.
-In the second half of the stage, multiple formations of orbs will enter the screen. A special bonus of 1,000 points is awarded for completely wiping out a formation, and the bonus increases by 1,000 points for every subsequently destroyed formation, up to a maximum value of 10,000. If the chain is broken, the bonus value will reset to 1,000 points.
+In the second half of the stage, multiple formations of orbs will enter the screen. A special bonus of 1,000 points is awarded for completely wiping out a formation, and the bonus increases by 1,000 points for every subsequently destroyed formation, up to a maximum value of 10,000 per formation. If the chain is broken, the bonus value will reset to 1,000 points.
 === Stage 5 Bonus Pods ===

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 '''''Viper Phase 1''''' (バイパーフェイズ1) is a 1995 vertically scrolling shooter arcade video game developed and published by Seibu Kaihatsu. Often regarded as a spin-off or spiritual successor to the ''Raiden'' series, the game shares many similarities in terms of gameplay mechanics and design philosophy. ''Viper Phase 1'' is the first game developed for Seibu Kaihatsu's SPI system board, featuring detailed sprite-based graphics and elaborate explosion effects.
-The initial release (now known unofficially as ''Old Version'') failed to gain acceptance among many players due to its unorthodox weapons system. Three months later, a revised '''''Viper Phase 1 New Version''''' was released, featuring adjustments that brought the gameplay closer to ''Raiden'', such as making sub-weapons permanent (see [[Viper_Phase_1#Version_Differences|Version Differences]]). This version also formed the basis for overseas releases of ''Viper Phase 1''.
+The initial release (now unofficially known as ''Old Version'') failed to gain acceptance among many players due to its unorthodox weapons system. Three months later, a revised '''''Viper Phase 1 New Version''''' was released, featuring adjustments that brought the gameplay closer to ''Raiden'', such as making sub-weapons permanent (see [[Viper_Phase_1#Version_Differences|Version Differences]]). This version also formed the basis for overseas releases of ''Viper Phase 1''.
 Hamster Corporation released the game (featuring both versions) as part of their ''Arcade Archives'' series for the Nintendo Switch and Sony PlayStation 4 in December 2024.
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 ! scope="col" style="width: 350px;" | Function
 |-
-| [[File:Viper_Phase_1_Wide.png|50px|center]] || <center>'''Wide'''</center> || <center>Fires shots in a fan-shaped pattern covering a wide area. Powering up expands the firing range. While the damage per individual shot is low, point-blanking enemies unleashes devastating attack power.</center>
+| [[File:Viper_Phase_1_Wide.png|50px|center]] || <center>'''Wide'''</center> || <center>Fires shots in a fan-shaped pattern covering a wide area. Powering up expands the coverage. While the damage per individual shot is low, point-blanking enemies unleashes devastating attack power.</center>
 |-
 | [[File:Viper_Phase_1_Laser.png|50px|center]] || <center>'''Laser'''</center> || <center>Fires a laser beam straight ahead. Although the effective range is narrow, the weapon is powerful. Powering up increases the thickness of the beam. This weapon is effective against heavily armored enemies.</center>
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 ==== Ground Medals ====
-At regular intervals ground medals will have a brief moment where they stop shimmering. Collecting them at that exact moment awards the maximum value of 2,000 points or 3,000 points, respectively, for small and large medals, as well as 100,000 points for a special medal.
+At regular intervals ground medals will have a brief moment when they stop shimmering. Collecting them at that exact moment awards the maximum value of 2,000 points or 3,000 points, respectively, for small and large medals, as well as 100,000 points for a special medal.
 ==== Airborne Medals ====
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 [[File:Viper_Phase_1_Bonus_Pod.png|left|thumb|50px|Bonus Pod]] Airborne medals do not feature a shimmering animation and will always be worth the base value of 500 points or 1,000 points, respectively, for small and large medals.
-In most cases, airborne medals will be released by specific bonus pod enemies. These enemies appear at a random horizontal position and at fixed times for each stage based on the elapsed time from the start of the stage. They will descend straight down from the top of the screen, briefly pause when they reach their inflection point near the center, and then change their trajectory back up and off the screen. Destroying a bonus pod on the way down yields five medals, but destroying it only after it has begun to travel back up the screen will make it drop ten medals. The ratio between small and large medals that are dropped is random.
+In most cases, airborne medals will be released by specific bonus pod enemies. These enemies appear at a random horizontal position and at fixed times for each stage based on the elapsed time from the start of the stage. They will descend straight down from the top of the screen, briefly pause when they reach the center, and then change their trajectory back up and off the screen. Destroying a bonus pod on the way down yields five medals, but destroying it only after it has begun to travel back up the screen will make it drop ten medals.
-</br>
-</br>
+The ratio between small and large medals that are dropped by bonus pods is random.
 </br>

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 ===== Stage 4 Bug =====
-Due to incorrect spawn coordinates, several enemies in Stage 4 are immediately deleted before the player can destroy them. As a result, a 100% destruction rate cannot legitimately be achieved in Stage 4 and 99% is the maximum. The ''Old Version'' has an equivalent bug in Stage 6.
+Due to incorrect spawn coordinates, several enemies in Stage 4 are immediately deleted before the player can destroy them. As a result, a 100% destruction rate cannot legitimately be achieved in Stage 4 and 99% is the maximum. The ''Old Version'' has the same bug in Stage 6.
 ==== All Clear Bonus ====
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 In this stage bonus pods do not appear regularly. Instead there are four locations where four ground medals are arranged in a diamond pattern. Hovering the player ship in the center of this pattern for about one second will make a bonus pod appear. Note that it is permissible to collect the medals surrounding the hover spot.
 == Story ==
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 Other region versions (Korea, Taiwan, Europe, etc.) are identical in content to the Japan ''New Version'' and only feature different license/distribution notices.
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 # Primary info provided by [[User:CIT Seven Force|CIT Seven Force]]
 # AI was used to analyze the game code and confirm score calculations, enemy spawn routines, and the rank system
 == Categories ==

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 |art = Toshinobu Komazawa
+|
-|releasedate = Japan Old Version: May 1995
+|releasedate = Japan: May 1995
-Japan New Version: August 1995
+Japan (New Version): August 1995
 USA: October 1995

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 # A.Y. Dayo | https://www2c.biglobe.ne.jp/~abfuku/raiden/rf_index.html
 # Primary info provided by [[User:CIT Seven Force|CIT Seven Force]]
-# AI was used to analyze the game code and determine score calculations and enemy spawn routines
+# AI was used to analyze the game code and confirm score calculations and enemy spawn routines
 == Categories ==