YOUTUBE is awash with explicit hardcore sex videos made using the children's game Roblox, The Sun can reveal.

The revelation comes just a day after a mum shared her outrage after finding her seven-year-old daughter's Roblox character being "gang raped" in the game.

7 The Roblox game is rated 7+ on the Apple App Store, and is clearly aimed at children Credit: Roblox

7 Roblox has been taken over by perverts who create virtual sex games in the app Credit: Roblox

Roblox is aimed at children, and riffs on Minecraft by letting players create their own mini-games and virtual worlds.

But pervy players have exploited Roblox's freedom, using it to create twisted fantasy worlds where they live out sex games.

A search for "Roblox sex" games on YouTube pulls up over a million results, with hundreds of top-listed videos featuring XXX scenes.

One incest-themed video featuring a character having sex with a female avatar from behind, and was titled "f***ing my sister on Roblox".

7 Searching for "Roblox sex" on YouTube brings up hundreds of twisted clips Credit: Roblox

The videos feature clear depictions of genitals, hardcore sex acts, and group orgies.

A clip titled "not banned Roblox sex" lasts for two-and-a-half minutes, and has racked up 345,000 views.

Another popular clip lasts for 10 minutes, and has been by 168,000 viewers over the past four months.

Some of the videos have been live on YouTube for more than a year, and many have received well over 100,000 views.

Other video titles include "Roblox sex with hot babe", "Roblox sex really nasty not banned", and "Roblox new sex game found".

The creators of Roblox describe their game as follows: "All the online games you see on the platform have been built by members of the Roblox community for members of the Roblox community.

"The types of gameplay on Roblox are just as limitless as the imagination of the creators themselves."

What is Roblox? Here's what you need to know... Roblox is a massively multiplayer game for young players

It lets anyone design their own mini-games and virtual worlds

These "social network" games are created using Lego-like virtual blocks

Players can create their own avatars, and speak to other gamers in real-time

The game was released back in 2006, and now has more than 64million players globally

It's available on iPhone, iPad, Mac, Windows, Android, Xbox One and Facebook's Oculus Rift

Roblox has proved controversial due to the creation of sex games inside the app

Anyone can access these explicit sex games, and take part in virtual XXX fantasy roleplaying

The game is age-rated 7+ in the UK and Europe

PEGI, which vets games for adult content in the UK and Europe, gives Roblox an age-rating of 7+.

Apple similarly rates Roblox for children, but provides a slightly higher age-rating of 12+ on the App Store.

But the cartoon-style graphics, characters that look like Lego, and colourful appearance means it's sure to attract very young children too.

Speaking to The Sun, Andy Burrows, the NSPCC Associate Head of Child Safety Online, warned against the game.

"It's blindingly obvious a game aimed at kids as young as seven shouldn't expose them to graphic sexual content," Andy told The Sun.

"Gaming platforms need to be moderated properly so that young children are not exposed to such inappropriate material.

"It's just as worrying that YouTube is hosting these videos that can be easily accessed by children. It shows why tough Government regulation to force social networks and sites to keep children safe is needed, with proper consequences for those that fail."

7 Players can chat to each other while performing sex acts Credit: Roblox

Worryingly, children looking for YouTube videos could very easily stumble across Roblox sex videos on the Google-owned site.

None of the videos seen by The Sun were age-restricted, meaning you don't even need an account or age-verification to view the clip.

Children could easily access these hardcore XXX clips without their parents knowing.

A YouTube spokesperson told The Sun: "YouTube's Community Guidelines clearly state that sexually explicit content is not allowed on our site.

"We remove flagged videos and channels that violate our policies, and in some cases, we age restrict material that, while not in violation of those guidelines, contains images that may be unsuitable for younger users."

The Sun understands that several channels that posted XXX Roblox content have now been terminated.

7 Children are exposed to graphic scenes and extremely inappropriate language Credit: Roblox

Earlier this week, North Carolina mum Amber Petersen revealed how she was left "traumatised and violated" after seeing her daughter being "gang raped" on the iPad version game.

She saw "male private parts" on the screen, and snatched the device off her seven-year-old daughter.

In a post on Facebook, she wrote: "My sweet and innocent daughter's avatar was being violently gang-raped on a playground by two males.

"Thankfully, I was able to take screenshots of what I was witnessing so people will realise just how horrific this experience was.

"Parents/Caregivers...not only do I urge you to DELETE THIS APP, I hope you will take another look at all of your devices and their security settings."

But even children without the Roblox app could see these sick sex games just by going to the YouTube website.

7 One YouTube video had an incest theme, and wasn't hidden behind any age barriers Credit: Roblox

According to Roblox, the game creators actively remove explicit content – but it's clearly not working.

"We protect our players’ safety by proactively filtering inappropriate content and acting against anyone who is in violation of our Rules of Conduct," explains the Roblox team.

"All uploaded images, video, and audio files are pre-reviewed by moderators before being allowed on the site.

"Our global moderation team is also online around the clock addressing any incoming concerns as reported by players."

YouTube also has mechanisms to remove explicit content, including human curation and algorithms that detect when porn has been uploaded.

But YouTube has repeatedly failed to keep its site clean.

Top tips for parents from the UK Safer Internet Centre British online safety charity Childnet has some tips for parents to help young people stay safe on Roblox. 1. Stay engaged and have regular conversations Show an interest in the games your children are playing. This could be through having a conversation about what they like to play or could be through watching them play the game. You could even have a go at playing the games yourself! If children know you have an interest in the game, they may feel more comfortable talking to you about it or coming to you for help if they need it. 2. Help them understand the importance of personal information Check that your child understands:

- the importance of keeping their personal information safe

- that the should speak to an adult straight away if the chat goes from being about the game to meeting up offline, personal information or sending images. 3. Set rules around spending money in games Have a conversation with your child to make sure they realise that is possible to spend real money on the game. Make promises that work for your family; perhaps your child will have to ask you for permission before they make an in-game purchase. 4. Make use of the safety features available Block and report :

Make sure your child knows how to find and use the report and block functions. Use the Roblox how to make a report page to learn how to do this.

: Make sure your child knows how to find and use the report and block functions. Use the Roblox how to make a report page to learn how to do this. Safety settings:

Set up the parental controls that are right for your family. You can also disable chat, set up the Parent PIN and use the Account Restrictions within Roblox. Click here for more information on how to use the Safety features.

Set up the parental controls that are right for your family. You can also disable chat, set up the Parent PIN and use the Account Restrictions within Roblox. Click here for more information on how to use the Safety features. Settings for under 13s:

There are additional safety features for under-13s , so it’s worth checking your child’s account is registered with the correct age. Players under the age of 13 have a <13 symbol next to their username on the game at all times, however this is not displayed to other players. 5. Encourage them to tell you about concerns Remind your child that they should come to you if they ever see something inappropriate, mean comments or if anything worries them within the game. If you know how to report this type of content within Roblox, you will be in the best position to help them if they need it. Read their full advice here.

Back in April, The Sun Tech revealed how YouTube had failed to take down hardcore porn videos that had racked up millions of views.

We uncovered dozens of smutty tapes that had been live on the site for years, despite YouTube's strict rules forbidding porn.

Later that same month, we revealed how sick pervs were "luring kids" using YouTube porn playlists filled with videos for children AND hardcore smut.

Speaking to The Sun at the time, an NSPCC spokesperson said: "Pornography gives children a distorted view of sex, body image and healthy relationships and in our research we found that nearly half of children who’ve seen pornography first stumbled on it by accident.

“These videos, apparently hidden in seemingly child-friendly playlists, are a clear example of YouTube breaching its own guidelines.

"Social networks and sites must prioritise child protection and we need the Government to step in and end the Wild West of the Web."

7 Scenes in the game are clearly inappropriate for young children Credit: Roblox

In April, The Sun also highlighted a raunchy YouTube porn ad that depicted a man and woman having sex.

When users clicked on the ad, they were directed to an XXX webcam site, where randy punters pay men and women to perform sex acts live on camera.

Google's own YouTube policy strictly prohibits sex clips: "YouTube is not for pornography or sexually explicit content.

"If this describes your video, even if it's a video of yourself, don't post it on YouTube.

"If a video is intended to be sexually provocative, it is less likely to be acceptable for YouTube.

"Sexually explicit content like pornography is not allowed."

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In March, The Sun Tech exposed an unskippable YouTube ad for "steroids without prescription".

The ad prompted users to "order steroids", lasted 49 seconds, and couldn't be skipped past.

Anabolic steroids are a dangerous way to build muscle mass very quickly, and are controlled as Class C substances under the Misuse of Drugs Act 1971 in the UK.

But the rogue YouTube ad for steroids promised "fast results" with "no side effects".

One user told us his children were forced to watch the full 49-second ad before being able to see a video of kittens.

YouTube has acknowledged The Sun's request for comment on this latest porn video blunder, and we'll update this article with any response.

The creators of Roblox did not respond to our request for comment.

If you're concerned about the issues raised in this article, head to the NSPCC's website to help parents understand the apps and games children use – click here for Net Aware

Do you think YouTube should do more to protect kids from Roblox porn? Let us know in the comments!

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