One Late Night is a horror indie first person game that was developed by Black Curtain Studio.
PewDiePie did a Let's Play of One Late Night that consists of one episode, which started on May 9th, 2013.
You are a hard-working office worker one late night in your workplace. One of your ex-colleagues, Robert, disppeared a few days before. Strange things happen in the office, most of them with a phantom by the name of the Black Widow behind them. You must find a way to escape the office without getting caught by the Black Widow, whoever she is.