From their announcement:
Rebel Minis is proud to announce our new 15mm modern skirmish game, Modern Havok.
Modern Havok is a fast paced set of skirmish rules for modern urban warfare. Designed for our 15mm modern miniatures line, these rules are based on the award winning Chain Reaction System by Two Hour War Games. Players control gangs, law enforcement or even mercenaries in a bid to control the streets. The PDF even has 3 starting scenarios designed by Ed himself!
Modern Havok is a standalone game and a great way to get started in the Chain Reaction system.
The PDF is $9.95 and we hope to have hard copies available soon. We will also be launching some box sets in the near Future!
You can see the rules here: RebelMinis.com
As always, thank you for your support.