Alpha 4 is out, I'm on premium beta so I have to wait until the 30th to try the latest builds but the single player missions that you get with the premium beta have been fun so far. I play a lot of battlefield and arma so I wasnt sure that flying and fighting with a space ship would hold much interest for me but they have some really interesting game mechanics. The main ones being that not only do you have to avoid being shot and balance power between systems in your ship but you also have to manage your ships temperature. By going into stealth mode you reduce your chance of being locked onto but you have the drawback that your ship holds in heat (and your shield is off) and if your temperature gets too high your ship's weapons stop working. So, mid-battle you might have to use your heat sink to dump heat quickly but this reveals your location and because of having no shield on you have to bolt out of there. I'm looking forward to getting access to the multiplayer content such as trading, docking in space stations and using the hyperspace jump: