It appears in the second loop and beyond on the "Normal" difficulty setting. Its methods of attack resemble those of Big Core MK II.
Heaven's Gate will unfold its arms and shoot many lasers, in a manner similar to Big Core MK II. In addition, it will shoot thin, green lasers while moving up and down at various speeds. When it folds, it will shoot the small lasers again, although this time 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 its way to the middle. While it's performing this attack, the main core port is vulnerable to attack.
In order to evade the lasers from this boss, the player can find a safe spot near the core.
In Otomedius Excellent, the boss has gained a few new tactics. It will fire missiles from above and below the center. After it folds its arms, it will fire a laser beam in the middle. On harder difficulties, it will fire bombs from behind at the top.
|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 MK-I Rev.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 • Laser Core • Lizard Core • Neo Big Core • Perla Meralda • Rexion Core • Rolling Core • Shining Core • Super Big Core • Terra Core • Vanishing Core • Genocide Core • Odin Core|
|Core-style bosses||Abaddon Warship • Covered Core • Covered Core MK II • Dead End • Kraken • Mayhem Warship • Metal Slave • Misfit Warship • Queensrÿche • Riot Warship • Plate Core|
|Pseudo-Cores||Death • 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|
|Parody Cores||Candy Core • Decoration Core • Decoration Core MK II • Viva Core|