Attack as Group

[Octavious]

Hi everyone ,
I am putting together an encounter, Specifically a group of 5 radroaches. The adventure calls for them to attack and fight as a "group". I cannot find any rules for that in the rulebook. Does that mean they all have the same initiative order ? or something else ? Im a bit perplexed on this , any advice is greatly appreciated

Thank you .

[superteddy57]

There are rules in the Core Rulebook as a sidebar under Chapter 10 > Types of NPC > Other Rewards.

[Octavious]

I see it now ! Thank you so much ..