TR-15 is the first challenging training mission that you will face while playing Arknights. It is designed to teach players how to return deployment points.
How do I refund Operator Points?
Just select the operator you want to return and select the "running man" icon (in the screenshot).
The first stage
These three heroes will be enough to keep the enemies on top.
There are several ways to complete this level, but the main thing is to return deployment points to your operatives.
The second stage
