When Sonic Forces launched in 2017, the game introduced one of the franchise's most divisive and striking antagonists: Infinite. Clad in a sleek mask and powered by the reality-bending Ruby prototype, this mysterious jackal commanded immediate attention. Beneath the digital distortions and floating geometry, players wanted to know who brought the villain to life and where his character arc truly originated within the lore of SEGA.
The English voice of Infinite is veteran voice actor Liam O'Brien, while Japanese voice actor Takashi Kondō handles his dialogue in the original Japanese track. Beyond the recording booth, Infinite's in-universe origin story traces back to the Sonic Forces: Digital Comic prelude, where the mercenary captain's encounter with Shadow the Hedgehog fundamentally shattered his ego and birthed his masked persona. This guide breaks down the performance, the actor's background, and the development history behind Sonic's masked menace.
The Voice Behind the Mask: Liam O'Brien
When players first heard Infinite sneering at Sonic and challenging the Resistance, they heard the distinct, raspy gravitas of Liam O'Brien. O'Brien brought a theatrical, brooding intensity to the role, capturing a villain driven entirely by a fragile ego and a desperate need to prove his strength after being called weak.
O'Brien is no stranger to major video game and anime franchises. His extensive voice acting career includes iconic roles such as Gaara in Naruto, Illidan Stormrage in World of Warcraft, and War in Darksiders. In Sonic Forces, his vocal delivery relied on heavy audio processing and a sharp, cynical sneer that separated Infinite from the deeper, more stoic growls of classic antagonists like Dr. Eggman.
For fans following the Japanese release, Takashi Kondō provided the voice. Kondō infused the character with a sharp, composed arrogance that contrasted with the more unhinged emotional breakdowns heard later in the game's narrative.
The In-Universe Origins of Infinite
Infinite didn't always wear a mask or possess reality-warping powers. Before joining forces with Dr. Eggman, he was the leader of the Jackal Squad, a mercenary group notorious for their brutal efficiency.
Eggman hired the Jackal Squad to protect his hidden base during an assault. However, Shadow the Hedgehog easily dismantled the mercenaries without breaking a sweat. When Shadow defeated the squad leader and mocked his weakness, the mercenary suffered a complete psychological fracture. Ashamed of his defeat and unwilling to let anyone see his tears of humiliation, he put on a silver mask, discarded his old identity, and dubbed himself Infinite.
This backstory bridges the gap between standard Sonic villains and more psychological antagonists. His power stems from the Phantom Ruby prototype, an artifact that allows him to create illusions so realistic they cause physical damage, trap enemies in virtual dimensions, and warp entire battlefields.
Development and Early Conceptions
During the early planning stages at Sonic Team, developers experimented with various concepts for the game's primary antagonist. Before settling on the name Infinite, the character's internal working title was simply "Zero".
This early moniker played a dual role in his conceptual design: it referenced the original prototype status of the Phantom Ruby as well as the character's psychological state of feeling like absolute zero after his defeat by Shadow. While early marketing material kept his identity heavily concealed to fuel fan speculation, the final narrative tied his personal humiliation directly to his absolute loyalty to Eggman's new empire.
Common Misconceptions About Infinite
Because Sonic Forces rushed through certain plot points, several myths and fan theories cropped up around the character's origins and fate.
- The Mephiles Connection: Many early fans theorized that Infinite was a returning form of Mephiles the Dark from Sonic the Hedgehog (2006) due to their similar color palettes and reality-bending abilities. SEGA and the writing staff confirmed that Infinite is an entirely original character with no direct canon link to Mephiles.
- His Ultimate Fate: Following the destruction of the Phantom Ruby, Infinite's exact whereabouts remain ambiguous. While the game implies he vanished alongside the fading illusions, his body was never explicitly shown as defeated or destroyed, leaving the door open for future appearances in the franchise.
- Vocal Effects: Some players assumed Infinite's voice was entirely synthesized by a computer. While digital distortion effects were layered over the audio tracks to give him an otherworldly presence, Liam O'Brien performed all dialogue lines naturally with the signature raspy snarl.
Frequently Asked Questions
Who voices Infinite in Sonic Forces?
Liam O'Brien provides the English voice for Infinite, while Takashi Kondō voices the character in the Japanese version. Alejandro Saab later succeeded the role for subsequent media appearances.
What is Infinite's real name?
Infinite's birth name is never revealed in the game or official comic tie-ins. He completely abandoned his former identity and human or animal name after being defeated by Shadow the Hedgehog.
Why does Infinite wear a mask?
He wears the silver mask to hide his face and bury his past. After Shadow the Hedgehog mocked his tears following a brutal defeat, he vowed to cast away his old self and any emotion associated with weakness.
Will Infinite return in future Sonic games?
SEGA has not officially announced when or if Infinite will return to the active character roster, though his ambiguous disappearance leaves narrative room for a potential comeback.
