Inspired by
this thread, what was the most anti-climactic point for you in an RPG? The moments with so much build-up that you just couldn't believe how lame they were in the end.
The most obvious example of this for me was the final boss of FF X. For all its faults I was still having fun with the game up until that point, but Yu Yevon was a complete embarassment. The entire world has been terrorized for 1,000 years by a glorified wood tick? Oh no, he's given all of our Aeons Lyme Disease! Not only that, but Square didn't believe that we could handle a freakin' tick after defeating numerous difficult bosses, so they gave everyone auto-life. No explanation like "Everyone in the world is praying for our success!" no sudden change of heart from a villain like Seymour showing up to help, and none of your party members giving up their strength so that your final party can fight on. Just random, unexplained immortality.
Tales of Symphonia springs to mind as well, but not for plot-related reasons. After barely escaping from the Asgard Human Ranch before it self-destructs, it seems like there's going to be a massive explosion to level the whole building. Instead, it cuts to the world map and there's just a very small puff of fire and the building collapses. Not so much disappointing as it was hilarious.
Jam it back in, in the dark.