In 2010, she portrayed Debra Simon in Paramount Network's sitcom Blue Mountain State. In July 2011, Richards published a memoir The Real Girl Next Door, a New York Times Best Seller. Richards decided to write a book because she "wanted to do something inspirational for other people going through challenging times," she told HuffPost in 2011. Richards was part of TV Guide Network's show, Hollywood Moms' Club, which aired in November 2011. In September 2011, Richards reportedly turned down $100,000 to appear as an ex-girlfriend at Charlie's funeral in Two and a Half Men. A month later, she began filming a guest spot for an episode for the sixth season of NBC comedy series 30 Rock. Richards played Kate Needleman in the comedy film Madea's Witness Protection (2012), which grossed $67 million at the box office. In 2012, Richards joined the cast of ABC Family's mystery-thriller television series Twisted. She portrayed Kat Faust in the musical thriller film American Satan (2017), for which Richards was nominated for the Festival Award for Best Supporting Actress in a Feature Film at the Northeast Film Festival. She starred in the supernatural horror film The Toybox (2018) opposite Mischa Barton. The film centers around a family, who go on a summer road trip in a used RV and get stranded in the desert by a supernatural force that is slowly killing them off.