Few people in the town of Leeton had ever heard of Vincent Stanford before he was charged with murdering high school teacher Stephanie Scott.

The reclusive school cleaner had no known friends, no social media profiles and had uttered little more than a polite "hello" to neighbours in Maiden Street.

But Mr Stanford maintained a secret online life, hiding behind fantasy characters to indulge his obsession with computer games, violent videos and neo-Nazi propaganda.

Posting under the moniker of the mythical Aztec serpent Quetzalcoatl, Mr Stanford told gaming forums that he "loved stargate and videogames" and "do a bit of 3d modelling in my spare time".

Digital traces left by the 24-year-old in at least four computer forums reveal that he spent most of his time in front of a computer, usually playing military-themed computer games or developing his own programs.

"Loved stargate resistance and i like fallout 3 gears of war franchise halo 1 through 3 and the dead space games," he posted in one forum in 2012, referencing several active-shooter games.

Mr Stanford signed a petition to save Stargate World and Stargate Resistant, games about a violent galactic warfare.

The Stargate series inspired him to write lengthy, rambling fan fiction as a teenager called "Secret endangered" about the fictional land of Atlantis which is "under imminent threat when wraith survivors know about atlantis".

In between the dozens of Stargate video clips that he "liked" on YouTube, he also liked pro-Nazi clips, clips supporting Libyan dictator Muammar Gaddafi and clips about the 2011 military science fiction shooter game, Gears of War 3.

On a video about Nazi leader Rudolf Hess, he posted "RIP Rudolf Hess. Ich bereue nichts", which translates as "I regret nothing".

He liked clips of Nazi marching songs, Third Reich military music and German military marches.

Mr Stanford, who was born in Tasmania and lived in the Netherlands for a decade, moved to Leeton about 14 months ago with his older brother, Luke, and mother, Anika. He was employed at Leeton High School, where Ms Scott, 26, was last seen on Easter Sunday, a week before her wedding.

Her burnt body was found five days later metres from a track in Cocoparra National Park, 70km north-west of Leeton.

Before working as a cleaner, Mr Stanford did work for his identical twin bother, Marcus, who was part of an Australian-based independent computer game company, Bullet Proof Studio.

Vincent was listed as a designer and Marcus as an animator on the never-released "shoot-em-up" arcade game Overseer.

One of the company's founders told Fairfax Media Mr Stanford "never actually worked" for the firm but "did contribute" to some of their projects.

"In our talks, he seemed like an ordinary person," he said. "He loved computer games, but that's almost a pre-requisite for what we were doing. Other than that, he was a very quiet person."

Bullet Proof Studio also began developing another title, ScareGame, a first person shooter set in the "lonely sewers" beneath London.

The game was to be based around a character, Nigel, who spends his time "torturing innocent victims" including "three young, ripe subjects" walking down a "desolate alleyway unprotected and completely unaware that they are being watched, hunted."

But a member of now-defunct Bullet Proof Studio said Mr Stanford had no involvement in ScareGame.

"Vincent was not working with us while we were developing project ScareGame," he said.

"He had no connection to this title in any way, and the project was abandoned shortly after conception due to unrelated reasons."

Bullet Proof Studio is the only employer listed on Mr Stanford's LinkedIn profile, which says he began working for the developer in 2010. He lists himself as a "computer games professional" from Rotterdam.

Police seized a computer from the family's rundown fibro home in Leeton after they arrested Mr Stanford on Wednesday. Police allegedly found blood spots in his car and a photo of a burnt body on a camera.

Neighbours said Mr Stanford was quiet, polite and largely kept to himself.

"I used to wave to him and he'd wave back, he's been over for a cuppa, we've talked over the fence and he seemed nice enough," said Gail Scanlan.

Little else was known about him in Leeton.

"It's really bizarre. Absolutely nobody knows him, and in a town this tiny, that's really strange," said Ashleigh Stockton, a receptionist at Leeton Soldier's Club.

"He's my age and I've lived here all my life but I have no idea who this guy is. It's a bit of a mystery."

The case against Mr Stanford returns to court in June.