UnknownEntity_2017

UnknownEntity_2017 (commonly referred to as Unknown) is a Roblox myth centered around a man whose humanity was lost and mysteriously returned. Once known as Zackary Ericsin, a SWAT officer from an undisclosed organization Unknown now wanders the platform as a quiet and unsettling presence. Those who encounter him often describe a sense of unease—like something watching from behind invisible glass.

Appearance

Appearance Explained

In the past, Zackary wore a tactical SWAT outfit, black hair, and shutter shades, reflecting his confident and reckless lifestyle. In 2017, after re-emerging in human form, he continues to wear the same outfit—though it now appears aged, outdated, and stained with time. His once-bold stance is replaced by a slouched, tired demeanor, as if the weight of his memories drags him down

Witnesses describe his presence as almost “unsettling vibe” with reality. When viewed from a distance, he moves slowly, rarely distort walks, or appear delayed—like an old recording that shouldn’t still be playing.

Personality

Past (2005): Zackary was a 21-year-old man who loved parties and alcohol. He was confident, loud, and often cruel to others—sometimes crossing into verbal or physical aggression. Despite his charm and humor, his temper made him unpredictable.

Present (2017): Unknown has become softer and more self-aware, though he tries to maintain a tough exterior. He carries deep regret for his past actions and is haunted by recurring nightmares and trauma. Beneath the mask of cold silence, he is kind, occasionally funny, and even gentle—when he allows himself to be.

Behavior

(Pre-Human) Behavior

History / Backstory

Before becoming an entity, Zackary Ericsin was a SWAT officer working for a now-erased company. In 2005, he lived with his wife, Delilah, who worked in the same office. For years, their life was calm, but Zack’s worsening drinking habits and violent behavior drove them apart. Delilah left in 2013—and died mysteriously three years later in 2016.

By 2017, Zack — now going by UnknownEntity_2017 — still lived in their old treehouse. He spent his days cleaning out the remnants of his past: throwing away bottles, burning Delilah’s belongings, and barricading the house with metal gates and wooden boards. The home became a tomb of memories and regret.

On September 23, 2017, Unknown met a new friend named ______, a half-fish, half-Robloxian hybrid. They bonded quickly and started dating that same month. By October 5, the two were married.

Unknown suffers from PTSD related to his past life and has recurring nightmares of his office being attacked by a tall, void-like monster that tears people apart. When triggered by mentions of “old lover,” he shuts down completely. ______ attempts to comfort him, but her understanding is limited — they are, after all, two very different beings.

It was later revealed that Delilah was not human at all, but a demon disguised as one, who had married Unknown two decades earlier. This revelation adds to the mystery behind his transformation and why he became an “unknown entity.”

After her death, Zack returned to the treehouse they once shared. He began throwing away all traces of her: bottles, magazines, weapons, even her old cork board filled with ideas. He ripped out the doors, boarded the windows, and turned the house into a locked tomb of bad memories.

Something happened that year—records of it are unclear—but by 2017, Zackary disappeared. What was left of him was UnknownEntity_2017

Affiliations

Trivia