Heaven's Gate is the true final boss of the boss rush in Gradius Gaiden. It will appear in loop 2 and beyond (IF you have the "Normal" difficulty). Although it is not directly connected to Big Core MK II, the method of it's attacks makes it look as though it were the spiritual successor of it. It also appears in the Xbox 360 game Otomedius Excellent as the boss of Stage 5 being piloted by Shiori Fujisaki, one of the main girls from the Tokimeki Memorial series.
Heaven's Gate will unfold it's arms and shoot many lasers, similar to Big Core MK II. Also, it will shoot thin, green lasers while moving up and down at various speeds. When it folds, it will shoot the small lasers again, but there will be barely any gaps to fit though. When it glows green, it will center itself and shoot thin lasers starting from the top/bottom and working it's way to the middle. While it is doing this attack, the main core port is vulnerable to attack. Otomedius Excellent has added new tac tics to it, it will fire missles from above and below the center, after it folds it's arms, it will fire a laser beam in the middle. On harder difficulties, it will fire bombs from behind at the top.
In order to evade the lasers from this boss, a safespot near the core will be the very easiest to defeat the boss.
|Ships||Vic Viper • Lord British • Jade Knight • Falchion β|
|Stages||Beyond the White Storm • Requiem for Revengers • Into the Crystal Cage • Ruins of Silence • Organic Fortress • Green Inferno • On the Event Horizon • Formidable Guardians • Fate...|
|Bosses||Blizzard Crawler • Grave • Nobil • Shining Core • Moai Dimension • Mad Skin • Stinger Kid • Hunter Fang • Giga's Rose • Kraken • Laser Tetran • DeathDouble • Parasite Core • Triple Core • Deltatry • Juggler Core • Neo Big Core • Heaven's Gate • Boost Core • Gunner Wall • Heavy Ducker • Sol • O.V.U.M.|
|Big Cores||Big Core MK I • Big Core Rev. 1.2 • Big Core MK II • Big Core MK II Kai • Big Core MK III • Big Core MK IV|
|Big Core variants||Beacon • Blaster Cannon Core • Bubble Core • Circle Core • Coreship • Crater Core • Crystal Core • Dellinger Core • Desert Core • Heaven's Gate • Juggler Core • Lizard Core • Neo Big Core • Perla Meralda • Rexion Core • Rolling Core • Shining Core • Super Big Core • Terra Core • Vanishing Core • Viva Core • Genocide Core • Odin Core|
|Core-style bosses||Abaddon Warship • Bubble Eye • Covered Core • Covered Core MK II • Dead End • Kraken • Mayhem Warship • Metal Slave • Misfit Warship • Queensrÿche • Riot Warship • Plate Core|
|Pseudo-Cores||Death (Gau) • Death MK II (DeathDouble) • Death MK III • Beta Core • Nobil • Triple Core • Crash Bam|
|Tetran variants||Tetran (Zylom) • Covered Tetran • Crystal Core D-X02 • Laser Tetran • Tenny Rop|