The Drunken Lizard Pub

I've got an idea:

When the player wins the game (in any ending or in a specific one) he/she gets a password he/she can later use at the menu or an external file to unlock extras, like the game trailer, exclusive screenshots, concept art, etc.

What do you think?

You don't have to have a password. Just make it so a variable in the game data is changed if you beat the game. That way you wont have to write down or try to remember a password, and players who haven't beaten it can't look up the password.

Anyway, for the idea, I like it.