I'm a moo2 fan and I love the artstyle of this game. I'm surprised no one has mentioned this. Of course I had to say this but please devs...feel free to focus on everything else and this obviously dead last. Even if you didn't envision this in your original desire for the game...PWEASE allow it so we can mod this in if we want.
Planet Killers anyone?
The Stellar converter beam consists of an intense plasma stream jacketed in a graviton beam. The Graviton beam maintains an intense compression on the plasma stream, allowing more plasma to be pushed into the stream while compounding the damage power of the beam. In addition, the Graviton beam is jacketed in a Phased tachyon beam, which will compound the damage even further. The Beam, upon impact with a planet or other target will rapidly cut through the crust and impact the core. The interaction between the target and the beam causes a massive release of energy, and the interaction between the Graviton beams and plasma are able to induce supercompression in the materials, creating micro-singularities, with a miniscule half-life. As the singularities decay, they produce antimatter and release tachyons. The antimatter reacts with the matter in the crust, causing a massive release of energy that assists in cracking the planet open, shattering it into pieces no larger than 20 kilometers. More info athttp://theshadowwar.wikia.com/wiki/Stel ... ter_Cannon
Intergalactic Mass Driver Cannon
One way to do this is to basically build a large railgun. To balance this, it could take up a hell of a lot of planet building slots and then be destroyed upon use.
Advanced Gravitational Control and Rocket engineering
Allows for the ability to target asteroids in space and hurl them against planets. Or strap rockets onto asteroids and have them slam into planets.
Mass Planetoid Energy Conversion
This planet killer is the most balanced because it comes at a great cost. You build an orbital structure that Is a giant mass to energy converter built in orbit. It converts your entire planet into energy and then projects that energy into a massive super laser that will wipe out targeted planet. Basically extremely costly to build, or perhaps a found artifact. It requires that you sacrifices your planet to destroy another.
All planet killers should come with negative social interaction effect. They should also be allowed the options to disable at game start for those who love to struggle endgame with ai races that just take and retake planets.