Saw this in another forum and thought it was a neat Idea to share.
The person that posted has a set of 3D asterdoids they mounted on hex bases (from AA20). Each turn they roll a 1d6 and move the asteroid in that direction.
I really like the basic concept, but since asteroids would not really change direction like that my thoughts are as follows:
Place the asteroid on a hex base (could be the the basic counters or 3D). Roll a 1d6 and the asteroid stays on that trajectory until it collides with a ship of another asteroid then roll a 1d6 to determine the new direction.
You could also add speed. Instead of all the asteroids moving the same speed (1, 2 or 3 staright), I would propose giving them varios speed values. Before thagme begins roll 1d6 to determine inital speed (1-2=1speed, 2-3=2speed, 5-6=3speed). Place a small die on the edge of the hex base showing the speed and direction of travel. When the asteroid collides roll for new direction and speed.
As for movement asteroids would be a value of 1 and would move before anything else, but after all movement is planned.
If an asteroid leaves the field of play you could simply have it reverse direction or bring it in on the opposite side of the play area.
Here is a pic form the game that was posted:

I think it would add a new dimension to the standard 100pt game.
Thoughts?
Edited by afilter