The Crimes of Alexander Stuart Mahan

(YandereDev )

Summary

Alex Mahan (YandereDev) is the creator and developer of the game Yandere Simulator, a game that started development back in March of 2014 which is still in development to this day.

The game saw a peak on YouTube, with multiple big gaming personalities like Markiplier and Jacksepticeye doing Let’s Plays. During this time, many media outlets did stories on the violent nature of the game, and it was the first point of controversy at the time.

In 2017, Alex was outed for having sexual interactions with a minor under the alias Evaxephon, between the years 2009-2010.

Two other victims have come forward since then with grooming allegations towards the game’s developer, all of whom have denied to pressing charges.

The YandereDev Patreon is Alex’s main source of income, where he strings out development as long as possible to scam subscribers each month who are devoted to the game.

Alex Before Yandere Simulator

Childhood - 2006 Era

Alex had a troubled life growing up. He suffered from severe bullying, and he used the internet as a means of escape.

He frequented the message board called Loserz, posting about his opinions about promiscuity. Alex was a catholic-raised youth, and when he was introduced to a broader community he was very vocal about his discomfort of women talking about sex.

He eventually was banned from the Loserz board.

Obsession With Sexual Fiction

Alex had started developing an obsession for sexual fiction around this time, circulating around rape. He began to write his own work involving rape, with some being the center focus. This obsession laid the groundwork for the rest of his future.

GaiaOnline and 4Chan- 2008 Era

After the ban on Loserz, Alex eventually moved to GaiaOnline to vent his frustrations on life and women.

He also started to frequent 4Chan’s Gaming boards to advertise his livestreams, through which he got contact to the first victim that we know of (A 14-year old girl at the time, who goes by the alias Sisefs).

Yandere Simulator

The Birth of YanSim - 2011 Era

Before Alex ventured into developing Yandere Simulator, he tried his hand at journalism where he was regularly mocked for his obsession with sex.

He then went on to start the game Lunar Scythe, where he tried to impress another game developer (Mike Z) in which he idolized. The developer gave solid criticism in which Alex did not handle well, and he swore to make a better game to get back at Mike.

The Peak of Yansim - 2015 Era

YanSim made rounds on the YouTube Creator space for its quirky game mechanics. In the age of YouTube that pushed increasingly edgy content, it sent YanSim to new heights.

Big names like Markiplier, Jacksepticeye, and Pewdiepie all jumped to make multiple videos playing for their communities. It drove people to the game, and allowed for Alex to go full-time on the game through his newly setup Patreon.

Grooming Allegations

The First Victim - 2017 Era

Grooming allegations were brought forward by a Tumblr account by the name of Sisefs, in which she stated that when she was 13 years old she was having a sexual relationship online with Alex who was 20 at the time. Alex was working with TinyBuild at this time, which ended in 2018 due to mismanagement and unprofessionalism.

The Second Victim - 2023 Era

In 2016, a 9 year old girl (Whose name was left Anonymous, as is commonly referred to as Jane) discovered Yandere Simulator. She was the second victim, and the first to be victimized due to the game’s relevancy. She started to send Alex fan mail, and things were normal at this point. In early 2023, she contacted Alex on discord where he isolated her onto snapchat and told her to delete the discord chats.

Alex and the victim shared many inappropriate conversations during this time, with the victim being only 16 years old. Alex was found to have listened to the victim masturbate and ask for CSEM. The victim reached out to a youtuber (AllySunne) to help make the story public. The victim then back tracked and sided with Alex, supporting him and saying the allegations were false, which with the surmountable amount of evidence that was given it look’s unlikely.

The Third Victim - 2024

This is the most recent, and they are the third victim to go public. VelvetStar explained in a post on r/Osana and attached a google drive link with evidence. She began contact in 2020 when she was 14, and then went on to be a moderator for Alex’s community. After 2022, Alex began to be affectionate towards the victim and started to flirt and make personal videos for her. When the 2nd victim came forward, she found out and cut ties with Alex.

Closing

The evidence and timeline of events was only made possible by the many caring people in the YanSim community who have spent countless hours researching and compiling as much info as they could. If it wasn’t for the Mods on r/Osana, the many users on it’s subreddit, and the people who shared the word of the victims, who knows how many victims Alex could have amassed.

Even if the mods on r/Osana are being dragged through the mud, the work they’ve done and the access to information is nothing short of respectable. We may not support their stance on fanart, but that’s where their story ends and ours’ begins.

For the full archive of evidence and sources, visit The Crimes of Alex Wiki here