This article is about a/an monster in Kamen Rider Ex-Aid.
Gamedeus Profile
Series: Kamen Rider Ex-Aid
Motif: Death
Fallen Angel
Black Sun/Nemesis (Gamedeus Muteki)
Villain Type: Boss
Affiliation: Bugsters
Homeworld: Kamen Rider Chronicle
Height: 232.9 cm
Weight: 132.4 kg
First Appearance: Accomplished Rebirth! (Union)
Reset Game! (Monster)
Last Appearance: The Last Smile
Number of Episode
6 (Ex-Aid)
1 (Movies)
Full list of appearances
Actor: Masashi Sugawara
Hiroyuki Takami ("Masamune Dan")
For his reincarnation in Kamen Rider Ex-Aid: True Ending, see Johnny Maxima.

"Gamedeus is an almighty god that is even more powerful than every game combined. When all game clear tokens are collected, Gamedeus will descend upon this world."
Kuroto Dan explains about the Kamen Rider Chronicle's final boss to Emu and the others[src]

"All you creatures living! I shall destroy all life!"
―Gamedeus' proclamation[src]

Gamedeus (ゲムデウス Gemudeusu) is the thirteenth and final boss Bugster of Kamen Rider Chronicle. As per the rules of the game, the Ride-Player who has defeated and claimed the Gashatrophies of the thirteen Bugster bosses will be able to challenge Gamedeus as the final boss of the game.

Character History



Silhouette of Gamedeus

While acting as navigator for a group of human Ride-Players, Poppy revealed the existence of the game's final boss, describing it as the final challenge to be faced by the Ride-Player who manages to defeat the twelve familiar Bugsters and claim their Gashatrophies. Start the New Game!

Entrusted to beat Kamen Rider Chronicle by Emu, Nico Saiba realized that she would have to defeat Parado before facing the final boss, encouraging Taiga Hanaya to accompany her in confronting him. Strongest VS Strongest!

According to Kuroto Dan, Gamedeus is the ultimate Bugster, transcending the power of any and all games. The only way to defeat Gamedeus is to obtain the power of Kamen Rider Cronus.

As theorized by Parado, since Cronus is the only one who can stop Gamedeus, Gamedeus would also have the power to stop Cronus as well, though Kuroto himself had assumed that Cronus could not be defeated via conventional means. With that in mind, Parado and Graphite went into the game world of Kamen Rider Chronicle to collect Gamedeus' virus data from the silver-colored Bugster Union form of Gamedeus. In an attempt to replicate the virus data, Graphite injected the virus into himself, but the power proved too much for him to handle. As Parado and Graphite faced Cronus yet again, Graphite transmitted the virus into Cronus' Buggle Driver II, which rendered the Pause ability useless. However, Lazer Turbo made his appearance and neutralized the virus within the driver. Accomplished Rebirth!

Graphite grew visibly ill as the Gamedeus virus multiplied within his body. He accepted his pain, however, as the price it would take to defeat Cronus and take back Kamen Rider Chronicle. Rescue the Partner! Indeed, Graphite was able to use the Gamedeus virus to successfully block Cronus' ability to pause in their next engagement, however, Cronus retained the advantage by seizing control of all Energy Items. Period with Tears Goodbye Me!

When Cronus' Reset erased Hyper Muteki, Graphite, whose condition did not comprove due to time rewinding, was left as the only obstacle to him. Seeking to prevent the advent of Gamedeus, Cronus initiated Pause before Graphite could finished in battle only for Graphite to turn on Cronus in defense of the Kamen Riders, branding Cronus' move a dishonorable interruption. The resulting Restart led to Graphite being finished by Ride-Player Nico, granting her the last remaining Gashatrophy, Drago Knight Hunter Z. Seeing the assembly of Gashatrophies bringing forth Gamedeus, Cronus attempted to initiate Reset only to be thwarted by the new Energy Item Save developed by Kuroto Dan. With that, Gamedeus finally made his appearance. Reset Game!

Gamedeus Advent

Once released, Gamedeus, acting on Masamune's changes to his behavior programing, proceeded to unleash his disease all over the population. Fortunately, Lazer Turbo and Genm were able to create a vaccine for Gamedeus's virus, which was successful, only for Cronus to barge in, destroy Gamedeus' physical body and uses his Gashacon Bugvisor II to suck up the data and inject his data right into his systems. It results with Masamune completely assimilating Gamedeus, becoming a Bugster. God Arrives! But the sacrifice by Poppy to fortify the Doctor Mighty XX Gashat's anti-virus which Parado uses to force Gamedeus out of Masamune's body, grabbing the monster so the antivirus can destroy them both and end the Bugster threat for good.The Last Smile

True Ending

Around the time that Gamedeus appeared, Masamune's former business partner Johnny Maxima stole the Gashacon Bugvisor of Graphite. Reset Game! As the Bugvisor contained fragments of Gamedeus' data, Johnny uses it to become a stronger form of Gamedeus. Kamen Rider Ex-Aid: True Ending



Gamedeus Virus

Bugster Virus bacterium.

The Bugsters originate as the microscopic Bugster Virus (バグスターウイルス Bagusutā Uirusu), a result of humans being contaminated by the Bugster, thus developing the condition known as the Game Illness (ゲーム病 Gēmu-byō). His viruses are unique, since they're white colored instead of orange, and they can even infect other Bugsters. These viruses can cause extreme pain and white flames on most Bugsters who contain this virus. They can also suppress certain abilities of Kamen Rider Cronus such as the Pause function when infected into Cronus' Buggle Driver II.

Powers and Abilities
Pause Immunity
Any Bugster infected with this virus is immune to Cronus' Pause ability, similar to Hyper Muteki.
Level 0 Gashats
Bugsters who are in the Game Areas created from Level 0 Gashats will have certain abilities restricted. In Gamedeus' case, its cultivation is suppressed by erasing its virus. Even if the virus is in any Gashacon Bugvisors, it can still be erased by touching the visor. However, this is only true for a small amount of its sample, as even Level 0 Riders were unable to disable the infectivity of a larger amount of the virus.
Bugster's Natural Resistance
Although the Gamedeus Virus can infect even other Bugsters, their natural physiology allows them to gradually develop a resistance, and even an immunity, to its infection. This immunity was, in turn, used to create the Doctor Mighty XX Gashat, which acts like a vaccine to the ultimate Game Disease.

KREA-Super Gamedeus

Gamedeus' Bugster Union form.

Powers and Abilities
Virus Cultivation: In its Bugster Union form, Bugster Viruses containing Gamedeus' data is generated on its body.

Appearances: Ex-Aid Episode 34

KREA-Gemdeus Bugster


Gamedeus is the most powerful Bugster enemy in the series, as even the co-operation of Ex-Aid Hyper Muteki and Para-DX Level 99 had a hard time fighting him, while previously the same combination was able to defeat Cronus easily. His health is 50 times of a normal Rider Gauge.

Powers and Abilities
Godlike Powers
As the final boss of Kamen Rider Chronicle, Gamedeus possess the greatest power of all Bugsters.
Worldwide Pandemic
Like the Pac-Man Virus, Gamedeus's virus can affect multiple people at the same time, even Bugsters.
Pause Immunity
It can be assumed that Gamedeus himself is immune to Cronus' Pause ability, similar to Hyper Muteki.
Bugsters Power Channeling
He can briefly manifest an image of a Bugster's head on his chest, and then use a technique unique to that Bugster:
By channeling to Kaiden Bugster's power, he can skillfully slash his opponents.
Magic Attacks
By channeling to Aranbura Bugster's power, he can unleash a powerful ice attack upon his opponents. It is the enhanced version of Aranbura's The Legendary Magic (伝説の魔法 Densetsu no Mahō).
Transcendent Secret Technique: Explosive Crimson Dragon Sword (超絶奥義:紅蓮爆竜剣 Chō-zetsu Ōgi Guren Bakuryū Ken)
By channeling to Guren Graphite's power, he can perform a stronger version of Guren Graphite's signature move.
Gamedeus stats

Gamedeus' original stats on Masamune Dan's monitor

Kamen Rider Cronus
As the symbol that was designated to go against Gamedeus. Cronus is one of the few riders who logically can defeat Gamedeus.
The key ability exclusively for Cronus to defeat Gamedeus. It can stop the flow of time around Cronus. It is also used to prevent any defeated Bugsters from being revived.
Doctor Mighty XX Gashat
This Gashat is specifically designed to neutralize Gamedeus's powers, as it acts like a vaccine against Gamedeus virus. It didn't only cure all infected patients of the virus, but also weakened Gamedeus significantly.

Appearances: Ex-Aid Episode 41-42, 44

Super Gamedeus
Super Gamedeus

Super Gamedeus

  • Height: 18.1 m
  • Weight: 80.8 tons

Appearances:: Ex-Aid Episode 43-44

Main article: Johnny Maxima

Gamedeus Machina

Gamedeus Machina

Appearances: Kamen Rider Ex-Aid: True Ending

Super Gamedeus Machina
Giant Gemdeus

Super Gamedeus Machina

Appearances: Kamen Rider Ex-Aid: True Ending

Gamedeus Muteki
Gamedeus muteki

Gamedeus Muteki

Gamedeus Muteki (ゲムデウス ムテキ Gemudeusu Muteki) is a silver and black-colored form based on Ex-Aid's Muteki Gamer (ムテキゲーマー Muteki Gēmā).

Appearances: Ex-Aid Final Stage

Behind the Scenes


Gamedeus is voiced by Masashi Sugawara (菅原 正志 Sugawara Masashi). His suit actor is Eitoku (永徳), who is also the suit actor for Kamen Rider Snipe. As G-Masamune, he is portrayed by Hiroyuki Takami (貴水 博之 Takami Hiroyuki).


  • Gamedeus comes from the words Game and Deus, Deus is a Latin word which means God. So a literal translation of Gamedeus's name would be "Game God".


  • Gamedeus' ability to channel the power of other Bugsters mirrors that of the Phantom Ogre.
  • Being designed as a final boss, Gamedeus' design pays homage to previous Last Monsters, but he was not the Last Monster. The final villain in the series was Cronus.
    • Like recent Last Monsters, Gamedeus possess fanged teeth and a red color scheme.
    • Gamedeus possess red wings on its back as the Bat Fangire does.
    • Gamedeus has a red mantle similar to Lord Baron's
    • Gamedeus has dinosaur heads on it's shoulders, in a similar manner to the Kyoryu Greeed's pterosaur heads.
    • Like other Last Monsters, Gamedeus has his own Rider-alter ego.
    • Uniquely, his giant form is the same shape as his Bugster Union form, albeit on a larger scales.
  • Like Para-DX Level 99 and similar to Daguva and Ultimate Kuuga, Gamedeus has some similar traits to Ex-Aid Muteki Gamer. The two have similar looking faces, having a central spike coming from his head that's pointing upwards in a way that resembles the top of the star, along with the ring-like part of his head somewhat resembling some of the other parts of the same star, as well as having golden parts reminiscent of Muteki Gamer's hair and colors.
    • Gamedeus' sword, the Deus Rusher, also bears some resemblance to the Gashacon Key Slasher, furthering his resemblance to Muteki Ex-Aid.
  • Gamedeus is designed by Tamotsu Shinohara.
  • Gamedeus Muteki uses a motif "black sun", not a name of Kamen Rider Black. While a "normal sun" motif was for Ex-Aid Muteki Gamer. Meaning this was reference to Nemesis, a hypothetical red/brown dark dwarf star that orbits the sun and other gaseous stars in real life.



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