Oguma (pronounced as Ogma) is a character and the main antagonist of Metal Slug 3D.
Story[]
Oguma is the CEO of the Oguma Corporation, a powerful and technologically advanced company that has obtained fame through various useful gadgets. He allies himself with General Morden of the Rebel Army to decipher a treasure that the general found 10 years before the game begins. This mysterious device is known as the Alator and it is capable of creating destructive weapons superior to anything else on the Earth.

Near the end of the game, Oguma betrays Morden by "taking back" the Alator. He reveals to Marco and company that he is actually a member of the Tuatha De Danann, an advanced race of beings that lived three hundred million years in the past. They placed the Alator on Earth three hundred million years ago as an information gathering device and intend to bring it back with them to the past. With the Alator, they intend to continue evolving their culture and erase the current timeline for their ideal history.

Oguma's betrayal.
Once his race reaches their evolutionary peak, it inevitably self-destructs. To prevent this, the Tuatha De Danann began their experiment by placing an Alator on a planet. The Tuatha de Danann sleep for three hundred million years and awake to retrieve the gathered information. If the world they examined clashes too much with their history, they will simply erase the world's current history and start the experiment again.
Oguma states that they have repeated the same experiment countless times before and have recorded each instance to avoid his race's evolutionary self-destruction. Later, Marco and company believe that Oguma's experiments have caused an open rift in the space-time continuum. He unlocks the Alator in Antarctica and it erects the tower giant, Lugus.

Final battle against Oguma.
While he transfers the information from Lugus to their records, the four heroes stand against them to save their history. After they defeat Lugus, another tower giant from one of Oguma's previous experiment, Lieu, absorbs it.

Oguma and his followers trying to tame Lieu before being absorbed by it.
When this happens, the Tuatha De Danann's collected data in Lugus is erased and Oguma is forced to tame the wild new creation, hoping to recover the data. Marco and his crew decide to destroy Lieu to prevent anymore damage to the world's timeline. In spite of their efforts, the Tuatha De Danann fail to control Lieu and prepare to meet their final end. Before his apparent demise, Oguma flashes a brief knowing smile to the player just before he is engulfed by the living weapon.

Oguma bids farewell after giving his data disc to Rumi Aikawa.
In the post-credit scene, Oguma is revealed to have survived and is last seen approaching Rumi Aikawa in the Desert Town. Expressing his sincere hope that her people may yet be able to learn from the mistakes of his, Oguma leaves the data disc containing the history of the Tuatha De Danann with her before calmly walking away.
Personality[]
Composed and wizened, Oguma is a polite scientist. He believes his actions are part of a large experiment that shouldn't be interrupted. In the end, he eventually believes in the power of humanity, partially due to Marco insisting that he lives for the future.
Gallery[]
Trivia[]
- Oguma is named after two figures of the Tuatha Dé Danann in Irish Mythology, Cermait and Ogma.
- He is very similar to the Doctor and Ptolemaios in terms of design and role where he's both a leader of a secret organization like the Amadeus Syndicate that uses robotics and cybernetics, while being a leader of a cult-like group like the cultists from the Ptolemaic Army.