|Original Air date||September 27, 2013|
Collage is the twelfth and final episode of Gatchaman Crowds. It first aired on September 27th, 2013.
Chaos ensues with more citizens using Crowds and fighting against each other as OD calls Katze out to the Gatchaman's hideout for a showdown. As Katze makes his way to meet OD, Hajime talks with him and promises him she will not kill him, inviting him on a "date" after everything is settled. Katze and OD fight, and although OD is heavily damaged by Katze, he manages to retrieve Rui's NOTE and deliver it to him. Rui then sends every GALAX user a Crowds app to take part in a "Tachikawa Crowds Game", setting up various types of games to encourage users to help out the community and defeat the Neo Hundred Crowds. After the situation is dealt with, Hajime gives her mother a call and reassures her that no matter what happens she will always be herself, and then goes to meet with Katze for their "date" showdown. A year later, the use of Crowds has become widespread, and Hajime, now in her third year of high school, makes her way to school while talking with Katze, whose voice comes out from Hajime herself.