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Gradius Wiki
For the Gradius III enemy, see Demos (enemy).

Demos (デモス De mosu?) is a boss in Gradius II.


Demos is a large, immobile boss, and the first gunwall to appear in the Gradius series. It is also known for its astonishingly huge number of safe spots.

At the beginning of the battle, Demos will first assemble itself by having its core come flying from the left side of the screen, destroying the player if they happen to be in its way; then it will properly commence its attack.

The laser turrets will be initially indestructible and must be dodged; however, they'll become vulnerable once the hatch opens and the core is exposed. They will aim at the player, but only to a certain degree. In addition, Demos will release Duckers from slots on its top and bottom, starting a standard tradition in the series.

In the arcade version of Gradius II, Demos has eight lasers and two Ducker slots; whereas in the Famicom version, it became much weaker, with less health overall and only four laser turrets.


  • Demos' name comes from Deimos (Δεῖμος – "dread"), the Greek personification of dread.
  • Demos has several safe spots, some include directly in front of it, on the ground to the right, or inside it. All of those were actually left intentionally by the game's designers.[citation needed]
Gradius II: GOFER no Yabō
Ships Vic Viper
Stages (arcade) Artificial SunAlienCrystalVolcanoRevenge of MoaiHigh Speed MazeBoss RushGofer Ship Interior
Port-exclusive stages Gradius II NES Stage 2 (NES) • Volcano - Crystal (NES) • Enemy Base (NES) • Gofer's Lair (NES) • Temple (PC-E)
Bosses PhoenixBig EyeGiga (NES) • Crystal CoreDeath MK IIJumping MoaiBig MoaiDesert Core (PC Engine) • Big Core MK IIZub RushBig CoreGolemTetranGawIntruderZelos Force (NES) • Covered CoreDemosCrabGofer
Mechanical bosses

Fortress ValisDemosDisruptBloody GateKeeper's CoreEnigmaCrystal GustCliff CoreGunner WallCore ReactorFortress GatePlate CoreTrue Venom

Shadow Walkers

Electronic CageCrabShadow GearShadow Gear MK IISolCrab-IIRotating WallElephant GearElectronic Cage MK2Crab Warlock

Other RecklessStrikerHeavy DuckerHydraGround SpiderCerberus