A trainer is an external experiment with the campaign state. Decide what you are testing, isolate the save, and keep the normal playthrough recoverable.
Choose the purpose before the tool
The game centers on extraction risk, gear retention, and campaign consequences. Altering that loop can be useful for learning a system or testing an interaction, though it also changes the meaning of the result.
Use an external utility only when the experiment has a clear boundary. A test save can answer a mechanics question without overwriting the state that carries a real campaign.
- Back up the save before launching a utility.
- Use a separate profile or disposable run for tests.
- Change one value at a time and write down the result.
- Stop if the game reports unexpected behavior or save corruption.
Do not turn a temporary test into hidden state
A good test leaves a trace that can be reviewed. Keep the original files, the version information, and the reversal path. That makes it possible to return to normal play without guessing which change mattered.
This site does not present a tool download or claim compatibility for any external trainer. Those facts are version specific and should be verified where the tool is maintained.