I am trying to get the second achievement for the rock cruiser "Destroy an enemy ship with a defense drone using only missiles." Can I get this achievement if I also use an Ion weapon?
The text indicates that the enemy must be destroyed. To destroy a ship you must do damage ether with weapons (missiles, bombs, beams, lasers) or with fire. The "with" of the statement could be referring to the use of any of these to do damage to the enemy ship.
The achievement could also have other constraints, like not being able to beam crew over and attack systems, not use cloak or shields or engines, etc. To me it sounds like you may only damage the hull with missile weapons. If this is the case then I could send my crew over to the enemy ship, take out their Drone Control system and rain down missiles as I please. I could also use ion weapons.
I would prefer the answer provide some proof backing up the claim.