Both are mind games where the protagonist has to win against a lot of people.
In "Liar game" the main character has a person to trust while in "Kakegurui" everyone is working on their own.

Both are psychological japanese movies with smart male leads that can solve all the mysteries.
Liar game is a franchise about mind games with money as the objective, while 12 suicidal children is about solving a mystery while in a life or death situation.
Both make you think very hard in order to find the answer.
Both are very impactful.
The last stage is a lot more like "Kakegurui" and less like "12 suicidal children" but it still fits that type of feeling.

Both are psychological japanese movies with smart male leads that can solve all the mysteries.
Liar game is a franchise about mind games with money as the objective, while 12 suicidal children is about solving a mystery while in a life or death situation.
Both make you think very hard in order to find the answer.
Both are very impactful.
In the second season the games are more intense and come closer to the mind games in "12 suicidal children".

Both are psychological and make you think outside the box while in a life or death situation.
Both have a male lead that can solve the crime (L and number 5).
Both have life as a tool and not as something given. Kira plays with people's lives while the 12 teens that are in "12 suicidal children" want to give their lives away.

Both are psychological and make you think outside the box while in a life or death situation.
Both have a male lead that can solve the crime (L and number 5).
Both have life as a tool and not as something given. Kira plays with people's lives while the 12 teens that are in "12 suicidal children" want to give their lives away.

Both are psychological and make you think outside the box while in a life or death situation.
Both have a male lead that can solve the crime (L and number 5).
Both have life as a tool and not as something given. Kira plays with people's lives while the 12 teens that are in "12 suicidal children" want to give their lives away.

Both are psychological japanese movies with smart male leads that can solve all the mysteries.
Liar game is a franchise about mind games with money as the objective, while 12 suicidal children is about solving a mystery while in a life or death situation.
Both make you think very hard in order to find the answer.
Both are very impactful.