Corroded Decontamination Facility added

On 11 March 2026, NCSOFT delivered the Sanctuary dungeon its January roadmap had announced, and published the number that sets the top of the entry ladder: "Entry requires a minimum level of 3,700." Corroded Decontamination Facility ends "in a battle against the final boss, Terminator Bargott", and clearing it yields "Hero- and Unique-grade items, including weapons and bracelets". It has not been announced for the Western release.

This is the delivery announcement for the Sanctuary content planned on 7 January 2026, described as a "New high-difficulty PvE dungeon now available, featuring new weapons and bracelets". It also carried a White Day event with craftable buff items. Where the roadmap gave a name and a date, this release gives the three things a player actually needs: the entry requirement, the final boss, and the grade of the rewards. That gap between plan and delivery is why this site reads both.

The figure of 3,700 places this dungeon at the top of the published entry ladder — above the Chapter 1 dungeons at item level 3,500, Mirror of Scarlet Desire at 3,200 and Sunken Temple of Life at 3,000. Only the Doom difficulty of Ascension Trial, at 4,000, sits higher on the public record. And note what did not change here: when NCSOFT removed entry tickets and raised party sizes to five players on 6 July 2026, it named Expedition and Transcendence dungeons and did not name Sanctuary. So neither change is assumed to apply to this content.

Before anything else: this update applies to the Korean service, and NCSOFT has published nothing about its presence at the Western launch of 30 September 2026. The condition people miss is the one this release publishes and the roadmap did not: a minimum level of 3,700. If you are planning a route through the game’s hardest cooperative content, that number is the gate, and it comes from the publisher rather than from a community estimate. What has not been published: the boss mechanics of Terminator Bargott, and the party size for Sanctuary content.