This might be just the thing I am looking for! Does this have rules for players to play as NPC mechs, like instead of licenses? Or is it just rules for them to pilot them like taking control of them on the battlefield?
Viewing post in Maximum Threat: A Lancer NPC Supplement comments
This supplement only contains rules for players to take over control of NPC mechs on the battlefield. Specifically it covers: Taking initial control, what you are allowed to do with it, what you can do with it after combat, etc. Keep in mind, you can always introduce NPC-like things as exotic gear for your players to use on their mechs. They do not necessarily need to be part of the licensing system to be used, certain downtime actions even allow players to create their own systems after a fashion.