Content classification officials in Russia have given EA's The Sims 4 an adults-only 18+ rating due to a controversial child protection law that passed in 2010.
Russian law 436-FZ, which is entitled 'On Protection of Children from Information Harmful to Their Health and Development', puts buying restrictions on content that is often deemed universal in other European countries.
Content can be restricted or outright banned if it is deemed to be "encouraging children to commit acts that endanger their lives".
That includes "desire to use narcotics, psychotropic and (or) intoxicants, tobacco, alcohol and alcohol-containing products", as well as promoting "unconventional sexual relationships".
It is unclear which law The Sims 4 clashes with. Its predecessor was rated PEGI 12 in the UK and Teen in the US.
Russian authorities were internationally condemned throughout February during the Winter Olympic Games held in Sochi, where athletes and spectators were told that indicating their sexual orientation, if homosexual, would be in violation of the law.
"We have no plans to alter The Sims 4," Deborah Coster, a spokesperson for The Sims, told Polygon.
"One of the key tenets of The Sims is that it is up to the player to decide how to play the game. We provide the simulation sandbox and player choice and creativity does the rest."