From their announcement:
In celebration of Wargame Factory’s new Shock Troop miniatures, Unified Theory Games is offering eight new Bonus Combatants to be used with the Vortex: Basic Battlefield Rules. This free downloadable supplement also includes model assembly suggestions and four sample Platoon lists. Though specifically designed to reflect Wargames Factory’s Shock Troops, these Bonus Combatants can be used with any suitable 20mm-35mm miniatures.
The Vortex Core Rulebook, scheduled for print in late 2010, is a fully customizable miniature skirmish game for use with any miniature in any setting.