Infinitrack

Infinitrack, known as "Infinite Ignition" ( Mugen Kidō) in the OCG, is an archetype of EARTH Machine monsters. They are focused around combining Xyz Summoning with Link Summoning.

Appearance
All the monsters have a continuous track on their bodies and marked with the infinity (∞) symbol. Each monster is based on various heavy-equipment machines.

Etymology
The Japanese meaning of Infinite Ignition, "Mugenkidou" (無限起動), is a pun on the Japanese word for "continuous track" (無限軌道), which is also pronounced  Mugenkidou. The "kidou" part meaning "track" (軌道) has been replaced with the one meaning "ignition" or "starting an engine" (起動). The TCG name, Infinitrack, seems to tie in the meaning of the pun.

The Link Monsters so far are named after giants of religious/mythological origins.

Playing style
"Infinitrack" is one of the most aggressive beatdown archetypes, even by Machine monster standards. They rely on their effects that are worded in a way that lets them interact with EARTH Machine monsters outside of their archetype. In particular, the "Railway" series, being also a EARTH-Machine Xyz focussed strategy, overlaps nicely with the theme.

Their Main Deck monsters predictably focus around swarming. However, they are different from older Xyz-based archetypes in that they have built-in Level-manipulation, unlike the ZEXAL-era Spells that couldn't be used competitively due to a lack of searching options.

All of their Xyz Monsters are capable of absorbing the monsters they've destroyed by battle as Xyz Material. They also all share this effect: "If this card is in your GY: You can Tribute 1 Machine Link Monster; Special Summon this card in Defense Position." (Only once per turn.) Otherwise, each of them made distinct from one another by their simple, yet effective effect activated by detaching 1 Xyz Material, generally centred around field advantage or resource management. (Also only once per turn.)

The Deck has so far two Link Monsters: "Infinitrack Goliath", a Link-1 focussed on providing Tribute fodder for the aforementioned effect while attaching itself as Xyz Material. "Infinitrack Fortress Megaton Gale" serves as the ultimate boss monster, a Link-3 that must be Summoned using 3 Xyz Monsters and is immune to all non-Xyz monster effects and indestructible by battle with non-Xyz monsters. It also can revive an "Infinitrack" Xyz Monster while attaching an opponent's monster to it as Material.