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The Big O
THE ビッグオー
Other Names none
Series Info
Broadcasting Type TV series
Episodes 26 (2 seasons of 13 episodes)
Original Airing Date/Release October 13, 1999 - January 19, 2000 (Season 1)
January 2,2003 - March 23, 2003 (Season 2)
First Appearance Super Robot Wars Destiny


The Big O tells the story of Roger Smith, a Negotiator who lives and works in Paradigm City, also known as the "City of Amniesia", due to the fact that an unknown incident 40 years prior caused the loss of all the citizens' memory. Whenever a monstrous machine or creature surfaces to threaten the city, Roger faces off against them in Big O, a giant robot known as a "Megadeus" that is yet another part of Paradigm City's forgotten past.

Season One

Episode No. Title Mecha Introduced Adapted in
1 Roger the Negotiator Big O
Dorothy 1
2 Dorothy Dorothy
3 Electric City Eel
4 Underground Terror Archetype
5 Bring Back My Ghost
6 A Legacy of Amadeus
7 The Call from The Past
8 Missing Cat
9 Beck Comes Back Beck Victory Deluxe
10 Winter Night Phantom
11 Daemonseed
12 Enemy is Another Big! Big Duo Mummy
Big Duo
13 R・D

Season Two

Episode No. Title Mecha Introduced Adapted in
14 Roger the Wanderer
15 Negotiation with the Dead
16 Day of the Advent
17 Leviathan
18 The Greatest Villain Beck The Great RX3
19 Eyewitness
20 Stripes
21 The Third Big Big Fau
22 Hydra
23 Twisted Memories
24 The Big Fight! Big Duo Inferno
25 The War of the Paradigm City
26 The Show Must Go On Big Venus

The Big O in Super Robot Wars

Units from The Big O are all...big. This series gives you the Big O, probably one of the most tankiest units in the series. Unfortunately, this results with enemies from the series being equally as annoying to kill with the exception of Beck's fraudulent megadeus, the Beck Victory Deluxe. Roger's negotiation skills become an actual pilot ability in the recent Super Robot Wars Z series, making unit losses extremely forgiving by reducing repair costs for shot down units to 0 so long as Roger is deployed and stays alive.

Fans of the series will also be treated to the special animation of Beck the Great RX3's killer technique that was never fully revealed in the TV series.

Super Robot Wars Appearances

The Big O's story and/or units have appeared in the following series:

Character Appearances

The following characters have appeared in a Super Robot Wars as either a playable character, an enemy, or are involved in the background story as a supporting ally/enemy. The characters are sorted by faction.

  • Roger and Company

  • Paradigm City Denizens
    • Alex Rosewater
    • Angel
    • Big Ear
    • Dan Daston
    • Gordon Rosewater

  • Beck and His Cronies
    • Jason Beck
    • Dove
    • T-Bone

  • Other
    • Alan Gabriel
    • R.D.
    • Schwarzwald
    • Vera Ronstadt

Unit Appearances

The following units and battleships have appeared in a Super Robot Wars as either a playable unit, NPC, or enemy. The units are sorted by faction.

  • Other Megadeus
    • Archetype
    • Big Duo
    • Big Duo Inferno
    • Big Duo Mummy
    • Big Fau
    • Big Venus

  • Beck and His Cronies
    • Beck the Great RX3
    • Beck Victory Deluxe

  • Other
    • Dorothy 1
    • Eel
    • Megadeus Archetype
    • Bonaparte

BGM used

Song Title Song Title (Romanji) English Translation Links
The Big-O Games

SURE PROMISE Sure Promise Games

The Great Games