Suggestions for hard SF rules

[Cholmondely Percival IV]

Thank you, Rick. There are a few there I wasn't aware of or had forgotten about. I'll also keep Khurasan in mind, particularly as I like the look of many of their historical ranges.

[Chief Lackey Rich]

Worth noting that Brigade is not only very good for 15mm vehicles, they also have extensive terrain options in many styles.  They're also unusual for catering to 6mm, 15mm and 28mm scales, with many individual vehicles and buildings being available in two or even all three scales.

Their infantry figure ranges and drones are a lot more limited (although they have been quietly expanding) but that's what GZG is best at anyway, at least in 15mm.  You really can't top GZG massive assortment of drones and small robots, and all their stuff works well with Brigade's own 15mm ranges.