Over the past few years we have developed many custom rules and resources for our narrative campaigns. You can find most of them here on this page. Feel free to use these however you like, including modifying them.
The following rules and resources were used to film our Augustine's Wreckage narrative campaign. They combine the rules of Armageddon with the campaign system of the Necromunda Community Edition, with the factions built from the Inquisimunda rules.
A HUGE shoutout goes to YakTribe.org and their awesome community who have worked hard to keep Necromunda updated and interesting.
Note from Matthew: I would recommend not using these rules and just using the rules as they are written in the Gorkamorka original rules. However, I still wanted to leave these here for those that wanted to see them.