潜行行动（Stealthy Operations） is a Helix Rift Event in Assassin's Creed: Rebellion that lasted from December 7-10, 2018. It comprised of six missions in which members of the Spanish Brotherhood who were adept in stealth infiltrated Templar strongholds in Spain, stealing resources and evading members of the Spanish Rite. Successful mission synchronization gave players Data Nodes which unlocked various reward tiers based on the total Nodes collected, with the top tier granting players the character Shao Jun to play in future missions, a Rapier, a Fine Gambeson, and a set of Warrior Boots. Players could earn extra Nodes if they used one or more of the following Sync Bonus Heroes:
|路易斯·奇科||50% at 1st rank + 25% for each additional rank|
|马西穆·巴罗萨||25% at 1st rank + 25% for each additional rank|
|芙萝拉·德拉克鲁兹||75% at 1st rank + 25% for each additional rank|
A Helix Rift Challenge features missions focused on a specific type of challenge, putting Heroes to the test in a dedicated Animus simulation. Enter this Rift containing Stealth-focused missions with the sneakiest of your Brotherhood heroes, and have them infiltrate the enemy strongholds without making a sound!