Kidou Senshi Gundam: Giren no Yabou - Zeon no Keifu

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Kidou Senshi Gundam: Giren no Yabou - Zeon no Keifu
System(s): Sega Dreamcast
Publisher: Bandai
Licensor: Sotsu Agency, Sunrise
Peripherals supported: Dreamcast Modem, Dreamcast VGA Box, Visual Memory Unit
Genre: Strategic Simulation/Senryaku-kyuu Simulation (戦略級シミュレーション)[2][3], Simulation[4]

Number of players: 1
Release Date RRP Code
Sega Dreamcast
¥6,800 (7,140)6,800e[3] T-13305M
Sega Rating: All Ages
Non-Sega versions

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Kidou Senshi Gundam: Giren no Yabou - Zeon no Keifu (機動戦士ガンダム ギレンの野望 ジオンの系譜) is a sequel to Kidou Senshi Gundam: Giren no Yabou for the Sega Dreamcast. Just like previous games in the "Gihren's Greed" series which were released for Sega Dreamcast and Sony Playstation, Giren no Yabou is a grand strategy-simulation game taking place during the "One Year War", which encompasses anime series "Mobile Suit Gundam", "08th MS Team", "War in the Pocket", "Blue Destiny" and some parts of the "Stardust Memory" and "Z-Gundam".

Story and Premise

Taking place in an alternative future, Mobile Suit Gundam takes place during year of Universal Century 0079.

In an era of space colonization and exploration, humanity has reached beyond the confines of the planet Earth. Earth Federation, which rules the planet and other space colonies maintains a tight control over the colonies due to the fact that humanity's home is suffering from material shortages.

Side 3, the farthest colony from the Earth, angry over the unfair demands of the Earth Federation, rebels and reborns as Principality of Zeon, a powerful and technologically advanced nation with the intent of maintaining its independence any means necessary. Gihren Zabi, commander of the Zeon's armed forces is not content with simply independence however, and begins preparing for full-scale invasion of the Earth.

Animosity between two sides finally reach a breaking point and war begins on January 1, UC0079. Armed with "Mobile Suits", large and powerful anthromorphic combat vehicles, Zeon inflicts massive damage to Federation Fleet and proceeds into invasion of Earth. Even though Zeon seems to be in the lead, it is clear that they also suffered serious losses that cannot be replaced easily, unlike Federation.

A short ceasefire is declared as both sides lick their wounds. Game begins after the "Antartic Treaty" which bans the use of WMD on Earth over the course of the conflict.


Players will takes control of either Prinicipality of Zeon or Earth Federation Space Forces and attempt to gain supremacy among the "Earth Sphere" (a term which includes Earth, Moon, and La Grange points) using technology, economy and military power. During the course of the game, players can live through famous battles or storylines from the original series.

Over the course of the game, players must not only maintain relations with neutral countries (Granada City on Moon or other independent space colonies) and their own military industry but also placate the parliament of their selected faction: If war effort suffers considerable sidebacks, an anti-war movement will begin to form. If defeats continue, parliament will sue for peace, ending the game prematurely.

Completing the game unlock new factions and scenarios that are not considered canon.

Playable Factions


Principality of Zeon
A militaristic, totalitarian dictatorship ruling the Side 3 colony clusters, farthest space colonies from the Earth. Originally formed as republic, named after its independence leader, Zeon Zum Daikun, the country reverted to a despotic monarchy under the Zabi family, after Daikun died under suspicious circumstances. (Read: Assassinated by Zabis) All members of the Zabi family hold high-ranking positions in the Zeon armed forces and government: Degwin Zabi as the Sovereign of the nation, titular character Gihren Zabi is the commander of the armed forces, Dozul Zabi is the commander of the Space Attack Forces, Kycillia Zabi as the commander of the Mobile Attack Forces and youngest son Garma Zabi is the commander of the Earth Occupation Forces. Country is more or less an absolute monachy despite having a parliament.

Expertly manipulated by state propaganda and Gihren's passionate speeches, Zeon armed forces are filled with proud and (mostly) suicidally fanatical soldiers hell-bent on "avenging their humiliation" and liberating their Spacenoid (a term used to describe human who are born and living in space) brethern from the Federation's yoke. Little do they realize that they are nothing but pawns in Gihren's dreams of total dictatorial control over the entire human race...

If players pick Zeon as their selected faction, they will play as Gihren Zabi, a charismatic, intelligent but also callous and power-hungry dictator of Zeon.

In terms of gameplay, Zeon is extremely powerful at the beginning of the game with almost total monopoly over the mobile suit technology. Many important strategic locations in both Space and Earth are under their control and army has many talented commanders and pilots under their command. However, that doesn't mean victory is assured. Federation will close the gap very quickly and later half of the game will be much difficult for a Zeon player. Therefore it is recommended that Zeon players should be aggressive during the first half of the game and conquer as much territories as they can. If Federation closes the gap thanks to their larger population and industrial capacities (which is exactly what happened in original series) Zeon is all but doomed.

Trivia: While not evident in the overseas versions of video games, anime and manga, Zeon is clearly based on Nazi Germany. In addition to design of the Zeon flag and military uniforms, in the Japanese versions Zeon soldiers and leaders often use the verbal chant "Sieg Zeon", which was changed to "Hail Zeon" in English versions for obvious reasons. Also, in the some cutscenes of the Japanese versions Zeon soldiers give Nazi salutes. The reason for that is Nazi symbolisms are not considered taboo in Japan.


Earth Federation Space Forces
A supra-national military organization that represents the Earth Federation, a futuristic version of United Nations. Formed about eighty years ago to unify the space colonization efforts, Earth Federation is ruled by a parliament consisting of elected representaives from the member nations.

Not taking Zeon's threat seriously, Federation suffered massive casualities during the first week of war as they helplessly watched their once proud space fleets were destroyed by Zeon's mobile suits. With many commanders and officers dead, Federation unifies the armed forces under Space Forces branch and begins their seemingly hopeless battle against the Zeon invaders.

Despite the fact that the Federation parliament has many with selfish, arrogant and corrupt politicians, compared to Zeon and its tyrannical government and genocidial methods of warfare, Federation is generally considered "the lesser of the two evils".

Players who pick Federation will play as General Johan Abraham Revil, highest ranking surviving commander in the Federation Forces.

Federation will be a quite a challenge for the players, especially during the beginning of the game. The weak position at the beginning of the scenario means that players will have to play defensively and protect what is left of their strategic locations (most importantly Jaburo and Luna 2) while simultaneously rebuilding their battered forces. Constant research is important to close technology gap between Federation and the enemy. If played right, Federation will be more or less unstoppable during the final quarter of the game and victory will be all but certain.

Magazine articles

Main article: Kidou Senshi Gundam: Giren no Yabou - Zeon no Keifu/Magazine articles.

Physical scans

Sega Retro Average 
Publication Score Source
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Publication Version Score
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Dorimaga (JP) NTSC-J
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Sega Dreamcast
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Kidou Senshi Gundam: Giren no Yabou - Zeon no Keifu

Dreamcast, JP
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Disc 1
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Disc 2

Technical information

ROM dump status

System Hash Size Build Date Source Comments

External links


Gundam Games for Sega Systems
Sega Game Gear
SD Gundam Winner's History (1995)
Sega Saturn
Kidou Senshi Gundam (1995) | Kidou Senshi Gundam Gaiden I: Senritsu no Blue (1996) | Kidou Senshi Gundam Gaiden II: Ao wo Uketsugu Mono (1996) | Kidou Senshi Z Gundam: Zenpen Zeta no Kodou (1997) | Kidou Senshi Gundam Gaiden III: Sabakareshi Mono (1997) | Kidou Senshi Gundam Gaiden: The Blue Destiny (1997) | Kidou Senshi Z Gundam: Kouhen Sora wo Kakeru (1997) | SD Gundam G Century S (1998) | Kidou Senshi Gundam: Giren no Yabou (1998) | Kidou Senshi Gundam: Giren no Yabou - Kouryaku Shireisho (1998)
Sega Dreamcast
Gundam Side Story 0079: Rise from the Ashes (1999) | Kidou Senshi Gundam: Giren no Yabou - Zeon no Keifu (2000) | Gundam Battle Online (2001) | Kidou Senshi Gundam: Renpou vs. Zeon & DX (2002)
Kidou Senshi Gundam: Renpou vs. Zeon (2000) | Kidou Senshi Gundam: Renpou vs. Zeon DX (2001)
Game Boy Advance
Kidou Gekidan Haro Ichiza: Haro no Puyo Puyo (2005)