Inferno is the epitome of a professional Autobot soldier. Calm and composed on the battlefield, he is careful to consider the consequences of his actions, and his patience makes him a superb sniper, one of the best shots in Optimus Prime's team.
- Japanese name: Inferno (firetruck body)/Inferno (V:) Volt (utility vehicle body)
- Hungarian name: Golyózápor (meaning "Bullets")
Soon after the defeat of Unicron and the reunification of Cybertron, Inferno was one of several Autobots who greeted the human delegation sent from Earth, managing to scare the crap out of a young Kicker.
Ten years later, Inferno was part of Optimus Prime's detachment of Autobots sent to investigate the mysterious attack on Mars and to help defend Earth. Landing on Mars, Inferno reported no signs of life in the aftermath of the attack. He then went on to Earth, where he helped take down several Terrorcons attacking Kicker before powerlinking with Hot Shot to destroy several more in quick succession.
As Terrorcon attacks on the Autobot installations increased, Inferno was given command of the new Cybertron City in the mountains, where he coordinated the defense against the latest attack before joining Ironhide in the aftermath of Scorponok's unsuccessful raid on Jungle City. Later, he was part of the Autobot detachment sent to reinforce Plain City, where upon arrival, he expressed surprise at the utter devastation that greeted them.
After Megatron made his return known, Inferno oversaw the severely damaged Hot Shot's recovery in the energon regeneration tank. He defended the repair bay from Terrorcon Ravage drones until he was nearly overwhelmed by their sheer numbers. Fortunately, Hot Shot recovered in time to help out his comrade, then together they confronted Megatron with the newly constructed copies of Megatron's sword.
After arriving on Iron Planet, Inferno was separated from the other Autobots and captured by Megatron. Under the uneasy watch of Starscream, Megatron repeatedly tortured Inferno by branding the Autobot's faction sigil with his magic Decepticon energies (similarly to how he branded Scorponok). Although Inferno was eventually rescued by Optimus Prime, a virus had been introduced into his system, over time turning him into a Decepticon. Inferno wrestled with this virus as he accompanied the Autobots to Jungle Planet, unwillingly assisting the Decepticons in finding energon.
During a confrontation with Scorponok, Inferno appeared to overcome the virus and assert his true allegiance when Kicker urged him to keep fighting Alpha Quintesson's energon sun., but to ensure he would not betray his friends again, he sacrificed himself by diving into
Inferno's spark was recovered, and he was reborn in a new, tamper-proof body under the name Roadblock. In his first mission rebuilt, Roadblock oversaw a flotilla of energon tower missiles sent by Dr. Brian Jones to attack Unicron's headless body.
While recovering on the Miranda II from damage taken while attacking Unicron, Roadblock took to referring to his male nurse as Nurse Flare, causing Signal Flare to hotly insist that he was a medical assistant, not a nurse. He checked himself out of the medical bay early, and took part in protecting Alpha Q's planets from Unicron under Rodimus's command.
- Inferno (Deluxe, 2003)
- Japanese ID number: SC-03
- Accessories: Missile
- Energon Inferno transforms into a Cybertronic water-cannon firetruck. His spring-loaded water cannon fires a blue projectile, and can also be turned and pivoted in several directions.
- In robot mode, his large windowed chest is a small homage to Generation One Ironhide's appearance in The War Within. Inferno can Powerlinx with any compatible Deluxe-class or Mega-class Autobot, forming either the top or bottom of each combination.
- The main differences between the Hasbro and Takara releases is the Hasbro version uses a darker silver plastic has several gold paint applications that the Japanese version lacks. This makes the Hasbro version marginally more accurate to his appearance in the cartoon.
- Inferno (Built to Rule, 2005)
- Built to Rule Inferno was originally designed as a Built to Rule toy of Armada Rollout, who was developed with a much more solid Trans-Skeleton with larger, blockier limbs, a design that was carried on to the true Energon Built to Rule construction sets. A pressure-launched water cannon was added onto the Rollout design to justify the change of character.
- The Energon Built to Rule line only had a limited, test market release initially in and around Cincinnati, Ohio. The sets later filtered out into some "Tuesday Morning" chain stores at drastically dropped prices.
- Inferno V: Volt (Deluxe, 2004)
- Japanese ID number: SC-21
- Acessories: Missile
- Like Generation One Grapple being a crane retool of Generation One Inferno, Inferno V is an extensive retool of Energon Inferno, replacing his front bumper, head, stabilizers and the entire water cannon structure with a new crane and cab. Like Grapple, Inferno V is colored mostly orange.
- The Hasbro version of this toy represents the toy-bio continuity character Roadblock, who isn't a powered-up version of Inferno.
- According to Rodimus' toy bio, he is Inferno's brother. Um. Sure! We'll buy that.