Discover how to unlock the Undermine campaign skip for alts!
Requirements
To unlock the Undermine campaign skip, your main first needs to complete the 
Undermined achievement. A portion of the achievement requires players to enter Liberation of Undermine and defeat Chrome King Gallywix. If you didn’t kill Gallywix on Normal or Heroic difficulty, you must wait until March 11 when Story Mode becomes available so you can progress the quest and earn the achievement.
How to Skip the Undermine Campaign
When your alt picks up When Opportunity Explodes, they can talk to Renzik the Shiv to skip the Undermine campaign. Alternatively, you can talk to Paks at the Incontinental Hotel, at any point during the campaign.