Dad Kim Yoo-chul, 41, and mum Choi Mi-sun, 25, called the emergency services when they returned home and found their daughter dead.
But cops became suspicious about how severely dehydrated the tot was. She appeared to starve to death.
An autopsy on the girl was carried out. It was found she was not fed for a long period of time.
The couple was extremely addicted to the online fantasy game Prius where as Prius parents, they have to nurture their virtual daughter who gains magical powers as she grows up.
While they raised their virtual child, they starved to death their 3-month old baby girl.
Kim Sa-rang weighed 2.9kg when she was born but due to the baby's parents' Internet addiction, baby was neglected and was fed only a bottle of milk a day.
Sa-rang was also beaten when she cried out her hunger.
The day she died, her weight was only 2.5kg.
The parents found their real life daughter dead upon returning home after one of their 12 hours a day at Internet cafes leaving the 3-month-old infant home alone at their apartment in Suwon, South Korea.
The couple played the game around 10 hours daily.
They had become obsessed with living online raising an avatar baby through their profiles on a Second Life-style game and neglected their real lives.
Cops tried to arrest the parents, but they disappeared after the baby's funeral. They caught up with them on Tuesday and they have since been charged with child abuse and neglect.
"Due to our sense of guilt, we have not been to a PC gaming room over these five months," the parents told cops after their arrest.
On Friday 28 May, Suwon District Court sentenced the 41 year old driver to 2 years' jail for negligent homicide but the term for his 25-year-old ex-factory worker's wife, was suspended as she is expecting another daughter due this August.
The South Korean couple were convicted for letting their newborn, 3-month-old, died of malnutrition in September, last year.
Online games are massively popular in the country.
A 28-year-old man dropped dead recently after playing his favourite game Starcraft for 50 hours non-stop without eating and drinking..
South Korean government said there were two million Internet addicts in the nation which is considered one of the world's most technologically wired, the Daily Mail reported.