I’m using Unity (free version) and i want to have homing lasers in my game, like in ZOE2
Can I do that with Unity (free version), or do I need Pro. And If i can, then how do I do that? 
The quick answer is yes you can do that with the free version of unity. You will need to understand how to create and modify meshes during runtime. There are unity tutorials on the asset store for free:
Those will get you started in the right direction. But it will take awhile to get it working to that level of sophistication in that game.
[EDIT:]
The easy way to do this is just to use shuriken particle effects.
Ok so I can draw the geometry using a mesh, but how do I make it glow? With a shader? How?
[EDIT:]
(As the lasers will be quite long, I don’t think it will work with particles)
Why does render-to-texture have to be pro only, when it is so easy to do with DirectX SDK?
Just use trail renderer for a quick solution. With glowy texture.
I get a 404 error when I try to open up the tutorial.
Hey - sorry if I’m necroing an old thread, can fully discuss elsewhere - but how would this be done with such a particle system? I’d be interested to know.