Babel mode is Catherine’s online connected tower climbing mini-game. Scores from this mode, which has Vincent scale a block tower as it falls from the sky, are posted on online leaderboards. Gotou probably has one of the top scores. According to Atlus, he’s a master at block climbing. Watch him climb a tower faster than a mountain goat.
If you missed the Catherine demo on PlayStation Network the first time, Atlus just put it back on PlayStation Network. However, it will be gone (again) at the end of this weekend. The Catherine demo is also available on Xbox Live and it doesn’t appear to have a time limit.