Ion drives (called electric plasma drives) are being used for satalite thrusters. Making larger versions are only a matter of time and economics. Rail gun technology is pretty solid and coming down in size. Laser cannons are in their infancy as ground based anti-missle systems but could be a plausible reality if researched. Torpedo are simply fancied up ICBM's but the fision drive on assault rockets hasn't even been approached yet. Seeker missiles - well the game isnt even exactly sure on how they work efficiently so its a wash in the real world. Particle beam weapons - a lot of theoretical work can be found on the subject on google but nothing substantial that approaches a weapons grade system. I humbly disagree on the microwave technology, I don't think were anywhere in the neighborhood of a ship based weapon. Using a oversized radar range on squishy little humans to make them sick and not want to fight anymore is one thing putting a hole in a space hull is quite another. I agree the theor has promise for mazer weapons but we aren't even in the same sport let alone ball park with that one. EMP is another weapon that holds a lot of promise that has not yet seen the light of day - of course if it did I may not be able to post my thoughts on the internet. I think we could mount some effective kinetic kill weapons like using chemical or electro-magentic propulsion. The atomic rockets site pretty much debunked the effectiveness of reflective hulls stating that it may make ships resistent but when you deal with that much energy a reflective surface wont stop a high power laser. Reactive armor is more realistic, except against lasers, it has been used since the 80's on tanks. RA expoldes outward when impacted producing an oposing force against the incoming projectile. I agree on masking screens - its just frozen water vapor, but getting it to deploy before it freezes in space would be a chore. I don't think we will see a working atomic rocket in our lifetimes unless their is a serious change in policy and attitude. FTL- well some people in the world think we already salvaged a gravity drive from a captured/recovered alien spacecraft i.e. bob lazard. Others consider FTL completely the delusion of science fiction movies. Either way we'll probably never know for sure in our lifetime.