While there is a chat function that you can use to communicate with the players on your server, there is another, more fun way to chat, and that is through posts. Learn how to leave posts in Once Human below.

There are plenty of reasons why you might want to leave messages in the world of Once Human. You might have a solution to a riddle or an access code that you want to share with others. You can also leave information about different locations, enemies in the area, resources, etc. But what I like the most are random messages from people saying hello and wishing you a nice day.

Related: Can You Change Worlds in Once Human?

However you use this feature, you'll need to learn how to do it first. In order to leave messages, you'll need to craft an item called Whisper. This item is crafted in the Supplies Workbench in your area. You'll unlock the formula for the Workbench once you select the Essential Tools Memetic node under the crafting tab.