Vunny you schould azk...
I have just finished my second game of Chain Reaction 3.0. this is a good product, in my mind. It can be a lot more lethal then most gamers are acustomed to, but it doesn't have to be.
It is designed for skirmish gaming cops and robbers or military vs military or military vs insurgents patrol engagements. The arsenal runs from the introduction of cased ammo to modern and tomorrow. There are no science fiction or black powder weapons.
There are rules for characters, buildings and vehicles, as well as rules for setting up clear, mountanous and forest terrain. All of the rules are sketchy and simple.
It is intended as an introduction to 2 Hour Wargames. The idea is to get you interested in the Chain Reaction system which eliminates the perfect control other games give players over their forces.
I enjoy it. This is now my standard set of rules. But frankly, I cheated and bought some of the other 2HW products as well. It IS a complete game, but I wanted more.