The "buying too many video games" line came from the gamification aspect of a social network owned by a private enterprise and has nothing to do with the government scheme. And even they have backpedaled from that claim:
"Hu Tao, Zhima Credit’s general manager, paints a different picture now. She says the app doesn’t monitor social media posts “nor does it attempt to measure qualitative characteristics like character, honesty, or moral value.” Zhima Credit is not a pilot for the social credit system and doesn’t share data with the government without users’ consent, she says."
from https://foreignpolicy.com/2018/04/03/life-inside-chinas-soci...
And the "posting fake news online" line actually refers to "spreading false information about terrorism" which quite a bit more serious.