Doom is a three-headed humanoid and is a rarity among the series because unlike most final bosses in Gradius; Doom actually fights back. He seems to have somehow revived the Zelos Force and a Salamander for his invasion, as seen in the game's intro.
Doom fires many purple bullets at the player and can also form and fire green energy balls. When he starts getting close to being destroyed, he makes objects fall from the top of the screen. His bullet patterns also become harder and harder to dodge as he loses health.The bullet patterns that Doom uses are comparable to those of Bullet Hell bosses.
- Due to the soundtrack calling the final boss theme "Giga's Rage",
|End Bosses & Major Enemies|
|Major Recurring Foes||Gofer • Bacterion • Dr Venom • Zelos Force (Zeros) • Lars Empire • Gofer Sisters|
|Minor Enemies||Brain • O.V.U.M. • Eleos Brain • Mother Computer Z • Guardian Core • Central Server • Genocide Core • Outer Limits / Metal Slave • Zelos Barrier • Doom • Dark Force|