Rearguard is a rare occurrence - a third-party supplement that transforms the game that it is based on. It's both kickass gaming material and kickass games criticism.
Beam Saber is a game that has war as its backdrop. Rearguard brings some of that backdrop into focus. Each of these playbooks introduces different kinds of war stories into your Beam Saber game. Introduce more than one and you will probably tilt the entire genre and tone of your game. I'm really excited that this exists. Loved reading it and excited to get it to the table at some point.