All 8 "Geargia" monsters focus heavily on searching out each other, swarming the field in the process and Summoning Rank 3 and 4 Xyz Monsters, especially their ace cards, "Geargiagear Gigant XG" and "Gear Gigant X". Each monster has a different effect to search out cards: "Geargiano" Special Summons any Level 4 Machine-Type monster from the Graveyard by Tributing itself, meaning that the card can be good to support other archetypes; "Geargiano Mk-II" can do the same as "Geargiano", but only with "Geargia" monsters, however it can also Special Summon the monster from the hand; "Geargiano Mk-III" do the same as "Geargiano Mk-II", but only if it is Special Summoned by the effect of a "Geargia" card; "Geargiarmor" search any "Geargia" from the Deck each time it is flipped face-up and is a solid wall with 1900 DEF; "Geargiaccelerator" helps to swarm the field, as it can Special Summon itself from your hand and has the bonus effect of adding another Geargia from your Graveyard to your hand when it goes to the Graveyard; "Geargiarsenal" can Tribute itself to Special Summon any "Geargia" from your Deck and also gains 200 ATK for each "Geargia" you control, even itself; "Geargiattacker" destroys Spell/Trap Cards on the field, up to the number of "Geargia" monsters you control each time it is flipped face-up. "Geargiauger" can search any Level 4 EARTH Machine-Type monster from the Deck, except itself, when it is Normal Summoned. But you cannot Special Summon monsters, except Machine-Type monsters, nor declare an attack, for the rest of the turn you use this effect.
One of the ace cards of the archetype, "Gear Gigant X" supports the Machine-Type, by allowing the player to add any Level 4 or lower Machine-Type monster from the Deck or Graveyard to the hand. Its effect to Special Summon a Level 3 or lower "Geargia" from the Graveyard when it leaves the field allows the player to easily control the Graveyard. The other ace card "Geargiagear Gigant XG" negates the effects of all face-up cards your opponent currently controls, also your opponent cannot activate cards or effects during either player's Battle Step, while a Machine-Type monster you control attacks or is attacked by detaching 1 Xyz Material. Its other effect to add 1 other "Geargia" card in your Graveyard to your hand when it leaves the field allows the player more Graveyard control.
The theme-supporting Trap Card "Geargiagear" Special Summons 2 "Geargiano" monsters from the deck and increase their level by 1 and allowing instant Xyz Summon of Rank 4 Xyz Monsters.
In order to stop Dr. Gearck's conquest of the entire world with the power of the evil gears called the "Warugiano", Professor Kurosu created the Gear Heroes known as the "Geargias"!!!
The Geargianos ("Geargiano", "Geargiano Mk-II" and "Geargiano Mk-III") are the power source that moves the "Geargia" monsters. The Gigant Carrier is a transport vehicle that carries the Gearunits ("Geargiaccelerator", "Geargiattacker", "Geargiarmor", and "Geargiarsenal"). The Gigant Carrier and "Gear Gigant X" can combine their gears to form the mighty "Geargiagear Gigant XG".
Warugiano is a portmanteau of "Warugi" (Evil Intent) and "Geargiano".
Gearck/Giack is a portmanteau of Gear and Aku (Evil/Bad/Wicked).
Kurosu Hakase = Professor Kurosu. Kurosu sounds like Cross, how the X in "Geargiagear Gigant XG" and "Gear Gigant X" is pronounced.
"Thunder King Rai-Oh" shuts down all searching within the Deck. It can also negate the Special Summoning of Synchro and Xyz Monsters, which can ruin the win condition of "Geargia".
"Vanity's Emptiness" and other cards that prevent Special Summoning prevents nearly every "Geargia" monster from using their effects. As well as preventing them from Summoning monsters from their Extra Deck.
Since this Deck's strategy relies a lot on "Geargiarmor", negating its effect to search for a "Geargia" monster and set itself backdown can stop the Deck's momentum completely.