Game file created by IncrediBots 3, a simulation game that uses physics principles and allows users to create their own custom worlds, called Challenges; saves objects and physical conditions of the world.

IncrediBots 3 does not natively save files with the extension ".ib3." Instead, when the user chooses to save a challenge, IncrediBots provides a text string that can be copied into a plain text file. While the .TXT extension could be used, a recommended extension is ".ib3."