One Late Night

 is a short immersive horror-game experience developed by Black Curtain Studio. It later spawned a sequel, One Late Night: Deadline, and a mobile port.

Story
You are an employee of Webcom who is working late at the office one night. After assuring Linda that you will be home soon, you drift off to sleep. Before you know it, it's past midnight and you still have work to do. You head off to the break room to get some much-needed coffee, but something in the office is amiss...

System Requirements
The following are the minimum and recommended system requirements for . While these requirements do not represent a guaranteed working configuration, meeting the minimum requirements should ensure at least a launch-able environment.

One Late Night is available for Windows, iOS, and Linux. It's recommended to have at least DirectX Version 9.0c or later to run the game.

Development
 was developed using the Unity Engine.

Reception
 received mostly positive reviews despite how rough the game is in some parts. Players praised the eerie atmosphere of the game's otherwise mundane office setting. The environment gave enough for players to explore, but not too much to be overwhelmed.