Ian Taylor, a former employee of UK games developer Jagex, has been charged and sentenced for assaulting a girl under the age of 13.
Cambridgeshire Police said the incident occurred in December, but was only recently revealed when the girl confided in a family member.
Taylor admitted to the offence and was sentenced earlier this week to one year and ten months in prison.
He has also been placed on the Sex Offenders Register for ten years, and given a Sexual Harm Prevention Order for the same timeframe to monitor future behaviour.
According to the police report, Taylor told officers he was drunk when the offence occurred. He showed remorse, admitted it was inappropriate and claimed he was depressed at the time.
Taylor was a senior audio developer at RuneScape studio Jagex, but was dismissed from the company earlier this year.
The studio issued the following statement to GamesIndustry.biz:
"Jagex expects the highest standards from its staff and we act decisively if those values that we hold dear are not reflected in the behaviour of employees. The person in question no longer works at Jagex, and was dismissed when the circumstances of the allegations came to light in March 2021.
"We have conducted an internal review of the employee's interactions with staff and any players he may have come into contact with during his time at Jagex. We have found no evidence that might prompt further investigation at this time."