Dice wars is a Flash game that’s like a simple version of Risk with a large element of chance.
It’s a great coffee break game with some subtleties because reinforcement is totally random and the number of extra dice you get at the end of each turn depends on the largest contiguous area you control. This means the AI will constantly try to divide and conquer your land at the weakest point.
The starting map is randomly generated and you also chose the number of AI opponents (up to 7) so each game is very different.