The concept of the IDSA/ESA arose from the controversies that the violence depicted in the video game Mortal Kombat drew. This led to a United States Congress hearing in late 1993 where the video game industry was put under scrutiny for the level of violence in games like Mortal Kombat and Night Trap. During these hearings, Sega and Nintendo blamed the other for the situation, citing differences in how they would rate the content of games for players.