I found this really cool game; as quoted from Steam:
Interplanetary is a turn-based strategy artillery game based on a hard scifi setting. It offers players an interplanetary battlefield where they can develop their home planets and use massive artilleries to wage war.
It’s an arms race of interplanetary scale, with each planet developing increasingly powerful railguns, missiles and even beam weapons. Sometimes, the greatest foe is the unpredictable planetary system with its treacherous gravity wells. Mind your surroundings, use them to your advantage and blast your enemies back to the stone age!
It’s like planetary Civ without a grid, and you can launch huge missiles.
The best part is, it’s $5 until Friday! (April 25)
Check it out here: Interplanetary on Steam
When you’ve bought the game (do it now) we can organize an online game! Hehehe, can’t wait to launch huge missiles through space at each other. (especially @SteveAdamo if he plays)
DISCLAMER: It’s still in alpha, so it may not be perfect in every aspect.