So what type of simulation is it suppose to represent? Modern, sci-fi, or fantasy? Is it going to be tactical based ie use maps or is it more in the minds eye ie using one's imagination? Do you have some background fluff worked out where someone would get an idea of what you are working on? It doesn't need mechanics or such but just a short description like " Striding out of the rolling smoke across the battlefield is a group of iron suits. Raising their arms up and aiming at their enemy, you watch in horror as cannon shot roars out and causes you fellow soldiers to fly through the air as the ground explodes around them. Rushing to the nearest body, you see limbs blown off while the soldier lays on the group twitching his remaining arm before life leaves his eyes." Something that catches a person's interest will net you more responses.
