You are *very* wrong about being the only user, in fact, I estimate there are *two* users to the program
The passwd field is cool, I also have the same awkward solution for my passwords. For this however there are two options:
1. Not safe, save the passwords in plain text
2. Safer, ask for a master password and encrypt the game passwords according to it. The master password will not be saved (duh) and hence is less convenient, but OtOH its safer.
My intuition tells me to go for the 2nd option, but I'm very interested to hear your opinion.