“Shingeki no Kyotou” was one audition of a special of the series Shingeki no Kyijon screened on the Tokyo sky tree. I haven't attended it in person, I do think it would have made for such an experience to be able to. The context was simple, a bunch of official edits of the main series with fabricated dialogue to make up for a parody of the Titans attacking the Tokyo tower, while the main characters of the series are defending it. Don't think that you've missed out on a huge thing, because all of the shots used are featured in the series in a way or another,however, they didn't have to be all related, a thus, a lot of shots from season two are being juxtaposed with the ones of the first season and order to trick you into thinking it was the same thing, and it actually worked in a pretty cheesy, but cool way.

Attack on Skytree is basically a bunch of attack on titan scenes that you've seen before but with the Tokyo Skytree edited into them. The dialogue has been changed to turn this collection of scenes into an attack on titan parody about protecting the Skytree from a titan attack. The main problem that this special has is that the only way to view it seems to be a video someone recorded on their phone and posted on youtube which doesn't make for a great viewing experience. The story itself is mediocre since it's just an attack on titan parody centered around the Skytree. The animationis good but it's mostly scenes you've seen before. The voice acting and music were okay. Overall this is most definitely NOT worth watching for basically everyone. The only available way to watch this is a phone recording, the scenes are re-used and its basically just something to entertain the people who were visiting the Skytree at the time.