Create a Crawler
Once all players have created their Pilot and Mech, the final step is for everyone to create the Union Crawler they share.
Your Union Crawler is a huge and sprawling Mech, effectively a walking settlement. A Tech 1 starting Union Crawler is about the size of a small village whilst the largest Crawlers are the size of cities.
Choose a Crawler Type
Your Crawler type provides a unique Ability that only it can do, as well as a special NPC who resides on the Crawler and confers their own bonuses. You can choose from the following list.
Note down your Crawler statistics
Your Crawler has a set of statistics based on its Tech Level. This includes its Structure Points, Upkeep, and Upgrade cost.
Note these down on your Crawler Sheet.
Choose Weapons Systems
A Union Crawler can mount Weapons Systems in its Armament Bay. To start, these can be any Tech 1 Weapons System of the players' choice. Most crawlers mount one; the Battle crawler can mount two.
Note this down on your Crawler Sheet.
Name the Crawler's NPCs
The Crawler is made of a number of Bays. Each Bay has an NPC assigned to it based on their experience and skill in operating the Bay. You can flesh them out with a Name, Background, Keepsake, and Motto. Each has 4 HP.
Give your Crawler a Name and Number
Provide your Union Crawler with a unique name and tag. For example, Crawler #132 is also known as 'Tin Lizzy'. Note these down on your Crawler Sheet.
Source: Salvage Union Workshop Manual, p. 212