It's significantly advanced alien technology, and thus akin to magic... stop trying to explain it.
(Disclaimer: This only applies to in game and most otherwise fictional things. I fully support trying to explain any actual real world phenomena, similar to this or otherwise.)
Seconded. If tech in games could be easily explained with science, then we'd have that tech in the real world. If we knew exactly what properties affected anti-gravity tech, and what we'd need to have it, someone would've thrown money at it to make it real.
We could have had asteroid mining colonies and a moon base decades ago. We could have had electric cars half a century ago. We
did have electric trolly networks in a lot of major cities back around the very early 1900s, but they were bought up and run into the ground by auto manufacturers.
Point is, just because something is possible and cool doesn't mean it will be done.
On a similar note, just because we understand
how something works doesn't mean we can actually do it. We've got a theoretical FTL drive, but that doesn't mean we're sending out FTL ships. We understand (more or less) how to do a core tap, but we can't do it (both because of the logistics and because it would be potentially really fucking stupid). Newton understood gravity, but that didn't mean he could directly measure it. The Nazis had rocketry, but they couldn't put someone into space.
Point the first: Just because something is understood and possible doesn't mean it will automatically happen, or can be practically applied.
Point the second: Don't be Stop Having Fun Guys, even for WMG. It's entertaining and doesn't harm anything. Also, I have to question whether lasers and plasma are really "significantly advanced" considering that we can already build pretty damned powerful lasers, and have at least a theoretical understanding of how to weaponize plasma.