The most fun and exciting aspect of Teardown is playing the Sandbox mode, as you can spawn in and do everything you wish. The only problem is that the game does not allow you to play with most items inside the Sandbox mode until you unlock them through the campaign mode. In such a scenario, you can open and use every object in Teardown bypasting a completed game fileinto your game save file directory. This makes your system believe that you have finished the campaign mode, unlocking every object for a Sandbox mode.
Related:How to play custom maps in Teardown

Unlock Maps and Objects for Sandbox in Teardown
As mentioned above, you will need to paste a completed save file into your file directory. you’re able to obtain a copy of the completed save file from thegiven URL.
After downloading the file, visit the game save file directory. By default, it is present atC:\Users%username%\AppData\Local\Teardown.
Search for a file namesavegame.xmland replace it with the downloaded file of the same name. Launch the game and every item in the game will be available for use in the Sandbox mode.
For more on Teardown, check outHow to disable alarms in TeardownorHow to install mods in Teardownon Pro Game Guides.