Patch 5.5 is now available in Final Fantasy XIV and players can now fight the third part of the YoRHa: Dark Apocalypse The Tower at Paradigm's Breach Alliance Raid. But before being able to go and fights some big robots and red girls to get exclusive rewards you might want to unlock it.
NOTE: You can only get the coin and rewards once a week and will be able to upgrade your Cryptlurker gear in Eulmore with this Breach Coin and the two past tokens.
Unlocking The Tower at Paradigm's Breach FFXIV 5.5
In order to unlock the Alliance Raid, you will need to complete the quest called "Konogg, Alone". This quest is available by talking to Dig Site Chief in Kholusia (X: 34.7 Y: 18.2).
To unlock the quest called "Konogg, Alone" players will simply need to have completed the previous YoRHa: Dark Apocalypse quest called "To Make Amends'.
This quest is part of the Nier Automata Quests added with Patch 5.3 of Final Fantasy XIV.