A card game where players compete against each other using statistics of serial killers has been branded as 'sick' by reviewers, but it remains available to buy online.
The Notorious Serial Killers game is made by Germany company Kulturmeister and features infamous monsters such as Dennis Nilsen and 'Yorkshire Ripper' Peter Sutcliffe.
If you've ever played Top Trumps, it's basically exactly the same as that, but with criminals who killed multiple people.
As concepts go, it's quite twisted, but if people are making television programmes about these types of people, it's not surprising that they generate a lot of interest.
After all, everybody wants to try to understand the warped mindset of a killer.
In this version, whereas tradition card games of this ilk tend to have stats like 'speed', here we've got stuff like 'age at first kill' and 'number of victims'.
Basically, the higher the body count, and the more prolonged their spate of killings, the better the card is likely to perform in the game.
They also bear a star-rating that is entitled 'maniac factor'.
Sutcliffe and Nilsen are among those represented from the UK, but there are other serial killers that you might not be as familiar with from around the globe, such as 'The Butcher of Hannover' - aka Friedrich Heinrich Karl 'Fritz' Haarmann - who killed at least 24 people in Germany between 1918 and 1924.
The top ranked card is that of Pedro Alonso López, a Colombian murderer who killed and raped more than 300 girls in his homeland, Peru, and Ecuador.
The game is described as 'the first trump card game with the 32 most notorious serial killers of all time'.
Participants are encouraged to 'play a card game with the most notorious serial killers of all time!'
The description continues: "Amazing facts about the most dangerous men of the modern age: How many murders did they accomplish? When did they start to kill? How many died already, how many are still alive?
"Get answers with this trump game."
There's even a blank card so that you can introduce your own favourite murderer, which is fun.
Or not, as some believe.
One of the surviving victims of serial killer Ted Bundy has had her say, she said: "I think they are totally in bad taste. They give recognition to the most horrific, despicable and twisted individuals that have lived.
"To expose children to these cards may teach them to accept that deviant behaviour is rewarded and accepted in our society."
One of the reviews online said: "Whoever created these Top Trumps should be imprisoned and the profits made from sales should pay for their stay in prison."
Another wrote: "Is it really the subject for a game? Imagine if your child was abused or killed by one of the men featured.
"How would you feel about that as a game people are playing for laughs?"
Featured Image Credit: KulturmeisterTopics: True Crime, crime, Weird, Murder