Mass Effect 5e - Player's Handbook
Random Grunt Generator
Grunts are disposable NPCs based on the Mass Effect archetypes. The Monster Manual outlines adjusting the provided NPC Archetypes with various races, weapons, and abilities, but this can be rather time consuming.
This generator enables you to quickly create random grunts with a given Challenge Rating (CR). CRs only go up to 12 because higher CRs represent much more powerful monsters. As a point of reference, a Banshee has a CR of 13, so a grunt with a CR of 12 would represent a very experienced and deadly NPC.