Horizon Wars: Midnight Dark is a miniature agnostic skirmish ruleset that can be used for any small scale miniatures. The setting is near to far future and although there is a written history Mr Robey Jenkins said that people are free to come up with your own background and the reason why there is conflict. I really liked the original Horizon Wars rules and also the licensed Hardwar rules made by Strato Minis. Here was the review I did for the first edition of Horizon Wars.
So using any miniature you want is one of the big draws for me. People who have been playing miniatures for a while probably have some small scale miniatures for a game that doesn't get played very much anymore. Games like Games Workshop 40k Epic or Battlefleet Gothic, Spartan Games' Dystopian Wars/Firestorm Armada/Planetfall, Gear Kreig/Heavy Gear, Dropzone Commander, Battletech, All Quiet on the Martian Front, Wizards collectable Axis and Allies minis...the list goes on. Even Lego! The Horizon Wars: Midnight Dark rules works well from 2mm up to 15mm. There are also three small scale miniatures coming out from three big companies: GW Legion Imperialis, Mantic Epic Warpath, and Warcradle Dystopian Wars. In the pictures below are a few that I have in that scale and some that are space combat based.
I've primarily used my old Wizkids Mechwarrior plastic miniatures to use with the Horizon Wars system. They are a perfect scale, around 12mm, and provide variety. I also bought a lot of them on clearance from several online warehouse stores about 15 years ago. Repainting them is also easy to do. Some examples of my United Faction are Infantry, Vehicles/Special Units, and Mechs/Aircraft. Most of the different units I have painted for my United faction are shown in the picture below.
Another great thing about the game is cost. Once you get the rulebook you can start with cardstock paper chits, dollar store toys and blocks, used toys, or whatever you have around. Then you can pick up miniatures cheaply as you go to replace or expand your army.
I recommend getting this new edition and trying out Horizon Wars: Midnight Dark. It is available from Wargames Vault here.