Gamer Driver

The Transformation Belt Gamer Driver (変身ベルトゲーマドライバー) is a transformation belt for the Ex-Aid Riders.

Compatibility
Before someone can properly use the Gamer Driver, they must become a candidate by undergoing a compatibility surgery, which introduces a small sample of the Bugster Virus to their body to induce antibody production. This presumably allows them to handle the side effects of usage, which would otherwise be dangerous. When a Rider gets a game over, the body of the Gamer Driver user will disintegrate into data. It is very safe to be used by the human users who have a natural Bugster antibody or possibly by the Bugster themselves. If a normal human tries to use a Gashat while wearing the Driver, the Game Start screen will be glitched and stop working, and if they been infected with latent Bugster virus, the infection will immediatelly reactivate.

Transformation

 * By inserting an active Rider Gashat into the right Gashat Slot, the user is able to transform into a Level 1 Kamen Rider.
 * By opening the Actuation Lever to reveal the High Flash Indicator projecting a transformation screen into the air in front of the Rider, a Level 1 Rider is able to level up to Level 2 by passing though the screen.
 * By closing the Actuation Lever, a Level 2 Rider can revert to Level 1.
 * By closing the Actuation Lever after activating another Rider Gashat, a Level 2 Rider will not revert to Level 1, and the user will be able to insert the Gashat into the left Gashat Slot and reopen the Actuation Lever to level up to Level 3 by passing through the pair of projected transformation screens.
 * By inserting a second Gashat in the left Gashat Slot while in Level 1 and opening the Actuation Lever for the first time, the user is immediately taken to Level 3.
 * The same procedures for Level 3 are used to access Level 5 if the second Gashat is Drago Knight Hunter Z.
 * If the Gashat is Mighty Brothers XX the user will access Level X and Level XX, the same procedures is used for Level 50 if the Gashat is the Gashat Gear Dual β.
 * By closing the Actuation Lever and removing the Rider Gashat(s), a Level 2 or above Rider's transformation will be canceled. Similarly, a Level 1 Rider can also cancel his transformation by removing the Gashat. This possibly means that a Kamen Rider cannot perform a Critical finisher while in Level 1 without using an additional Gashat.
 * When a Rider's Rider Gauge is critically low, Gamer Driver's protection function will automatically eject the inserting Gashat to cancel the transformation and preserve their life. This function, however, can be prevented by the Rider themselves, or by the Deadly Jammer of Zombie Gamer.

Playable Games
It is revealed that the Gamer Driver has a set list of playable games from corresponding Rider Gashats, and when a game's victory condition is fulfilled a projection from the belt states "Game Clear!" over the corresponding image of the Gashat in the Driver. The Gamer Clear count is independent from the Rider who cleared it, as when a Rider clears a Game, other Riders' previously cleared Games are also shown as Clear. The only exception is in episode 3, after Snipe cleared the Bang Bang Shooting, none of other games come with a "Game Clear" title; however, this is likely a production error. The overall "Game Clear" count accumulated by each of the Kamen Riders is kept track of through a screen in Genm Corp.

After the 10 games are cleared, however, "Game Clear!" is still announced upon the defeat of a Bugster, though without the projected list of game titles. This seems to simply indicate that a battle has been won and no longer relates to the Gashats being used, as there is no longer a connection between the Gashat involved and the Bugster defeated.
 * Mighty Action X: Cleared by destroying the boss monster Salty Bugster.
 * Taddle Quest: Cleared by destroying the boss monster Aranbura Bugster.
 * Bang Bang Shooting: Cleared by destroying the boss monster Revolve Bugster.
 * Bakusou Bike: Cleared by defeating the boss monster Motors Bugster in a motorbike race.
 * Gekitotsu Robots: Cleared by destroying the user Collabos Bugster (Gekitotsu Robots).
 * DoReMiFa Beat: Cleared by destroying the user Collabos Bugster (DoReMiFa Beat).
 * Giri Giri Chambara: Cleared by destroying the user Collabos Bugster (Giri Giri Chambara).
 * Jet Combat: Cleared by destroying the user Collabos Bugster (Jet Combat).
 * Shakariki Sports: Cleared by defeating the user Kamen Rider Genm.
 * Drago Knight Hunter Z: Cleared by destroying the user Graphite.
 * Ju Ju Burger: Cleared by making the Burgermon Bugster happy through preparing a burger.

Stage Select
By pressing the button on the Kimewaza Slot Holder without any Gashat inserted in it, the gamer can choose one location from an offered list. This completely rewrites the Game Area, literally teleporting all participants to another battlefield, even pulling in people not present at the location where the function is triggered from. This could be used to expand the fighting area, as well as to protect the original location from being damaged. Clearing a game will return the players to their original location, and being blasted out of a transformation with enough power can "eject" individual players.
 * A modern, bright city.
 * A racetrack.
 * A dark city at night.
 * A blue sky.
 * A beach.
 * A lake surrounded by trees.
 * A millitary shooting area.
 * A scrapyard.
 * A forest.
 * A dried lake.
 * A town square.

Selectable Characters
After inserting a Rider Gashat, Riders select their armor from a spinning array of ten profile images, below ordered in counterclockwise as seen from above. It is possible that the forms the Rider could use are independent of the active Rider Gashat, and the gamer can choose his favorite character from the set list before the transformation begins, but this concept has yet to be explored onscreen and is thus unconfirmed. Kuroto Dan's Gamer Driver also comes with a unique selectable character located between Lazer Level 1 and the grayed Ex-Aid image, his character list in turn including only one blank silhouette image instead of two.
 * Ex-Aid Action Gamer Level 1
 * Brave Quest Gamer Level 1
 * Snipe Shooting Gamer Level 1
 * Lazer Bike Gamer Level 1
 * Grayed Ex-Aid Action Gamer Level 1, yet to be used
 * May be intended to be Proto Ex-Aid, but differs from Genm because Genm uses a purple Proto Mighty Action X Gashat, while all other Proto Gashats are black, meaning this might be selected if a black Proto Mighty Action X Gashat were used.
 * Proto Brave Quest Gamer Level 1, yet to be used
 * Proto Snipe Shooting Gamer Level 1, yet to be used
 * Proto Lazer Bike Gamer Level 1, yet to be used
 * Two generic silhouettes with question marks
 * The one next to the colored Ex-Aid changes into Ex-Aid Double Action Gamer Level X when Emu first transforms into said form. After revealed, it will appear in all Riders' available profiles (this was not the case with the Ex-Aid's transformation into Action Gamer Level 1 in episode 14, but this was merely a production error).
 * The same silhouette had previously changed into Ex-Aid Ghost Gamer Level 1, though it may be the case that any Legend Rider Gashat temporarily occupies one of the blank slots when used.
 * Genm Action Gamer Level 1
 * When Genm uses the Magic The Wizard Gashat, his list is missing Genm Action Gamer Level 1, instead including Genm Wizard Gamer Level 1 (showing Wizard himself instead of a Level 1 form) replacing the blank slot next to Ex-Aid.

Kimewaza Slot
By inserting a Rider Gashat into the Kimewaza Slot (it needs not be the Gashat used for the transformation), a Rider can trigger a Critical Strike finisher based on that Gashat after pressing the button next to the slot twice.

Of note, Genm inserting the Shakariki Sports Gashat into the Kimewaza Slot without pressing the button summoned the Sports Gamer bicycle in his initial debut.

History
The Gamer Drivers, along with the Rider Gashats, were created by Kuroto Dan, CEO of Genm Corp. as a countermeasure to the Bugsters after the occurrence of Zero Day.

more to be added

Users (chronological order)
In addition, Kuroto Dan, whose company created the Gamer Drivers, also has one, but it is still undetermined when he started using it.