A little gem! Simple but fun D10 sci-fi skirmish rules for 5-10 miniatures each side, with character generation that allows you to play with every miniature in your collection, in every scale (I use 28mm with 4" range). Also easy to customize with house rules; adding characters features, weapons etc. with some adds-on I think they could work for light-hearted WW1-WW2, Pirates etc. Vehicle rules are missing but they can also be made up easily.

A D10 spinoff of this company's D6 Alien Worlds game, this game caters to children and adults alike who are looking for a simple, straightforward rule set that lets you quickly enter into exciting tabletop battles with virtually any miniature figures you may own. More importantly the system is open to addition of fan-generated rules and special character abilities allowing players to easily adapt this system to other genres.