For the Gradius II boss, see Demos.

Demos (デモス De mosu?) are minibosses appearing in the arcade version of Gradius III. They are an upgraded version of the original Zub Rush from Gradius.

Attack patterns

The attack patterns of the Demos and Zub Rush are the same but they vary depending on how many Zubs are onscreen at the same time. Gradius III arcade increases the danger level of Zubs by allowing them to fire bullet spreads and also appear in fewer numbers, meaning less chances for powering up. On higher loops, in most games they fire suicide bullets.


  • Demos was replaced by the normal Zub Rush miniboss in the Boss Rush of the SNES version of Gradius III.
Gradius III
Ships Vic Viper
Stages DesertBubble ZoneVolcanic PlanetHigh Speed DimensionMoai ZoneCell PlanetProminence PlanetPlant PlanetCrystal ZoneBoss RushMechanical Base
SNES exclusive stages High Speed ZoneFortressCell
Bosses GoliathBubble EyeGodreiBig Core MK IIIDogasVaifTwin Vaif (SNES) • GregolWyvernVulture DragonChoking WeedLizard CoreBeacon (SNES) • TetranCovered CoreBig Core MK IICrystal CoreDeath MK IIDellinger CoreDisruptShadow GearShadow Gear MK II (SNES) • Big CoreGolemBacterian
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