Eternal Return is authenticated through Steam, so your ER account is as protected as your Steam account is.
For the most up-to-date advice on how to keep your account safe, have a look at Steam's Account Security Recommendations.
If you want to change your Steam Password, follow these steps:
- Log in on Steam. Click on your display name in the top right corner, and then on Account Details.
- Locate the Account Security section and click on Change my password.
Important:
Make sure never to share your password or other login details with anyone else. Remember that anyone asking you for your password is most likely out to scam you in some way.