In the Frogger episode, George discovers that his initials "GLC" (George Lewis Constanza) are still on the Frogger machine from a high score he got ten years ago. The arcade game "Frogger" does not record initials for high scores. The game has a list of the top five high scores, but there are no initials with them. There is no provision in the game for you to enter your initials when you make the high score list. I used to play Frogger a lot back when it was popular, and I also saw a couple of the old machines recently. I'm pretty sure that there weren't any variations of the game that let the players enter their initials.