Fortress Gate attacks by using its missile firing turrets and firing plasma shots. Depending on the difficulty, the plasma shot will split into 3-5 shots upon being destroyed. Also, Duckers will travel along the bottom and occasionally shoot in order to distract the player. The missile turrets can be destroyed even though there is no indication that they're taking damage.
|Game Boy Gradius games|
|Ships||Vic Viper • Coreship|
|Nemesis Stages||Volcano • Cell • Moai • Bone • Fortress|
|Gradius: The Interstellar Assault Stages||Remains • Battleship Interior • Asteroid Belt • Planet Surface • Fortress|
|Nemesis Bosses||Volcano • Super Big Core • Zub Rush • Crawler • Zigzag • Striker • Amb • Reckless • Mother Computer Z|
|Gradius: The Interstellar Assault Bosses||Infected Statue • Core Reactor • Volcano Core • Fortress Gate • Guardian Core • Escape Ship|
|Other||Reckless • Striker • Heavy Ducker • Hydra • Ground Spider • Cerberus|