Spectator Mode

The Spectator Mode is a Game Master exclusive feature that gives them the power to enter rooms invisibly without being seen.

How Spectator Mode Works
This "invisible" mode lets you move around the map, go through walls, fly to the top of the map, and even go outside the map. Game Masters mainly use this feature to observe players, catch abnormal activities, and find hackers. To enable this feature, you must be a Game Master, go to settings, click "other", and enable the mode.

For more information and details, refer to the video below.