Ok, I have a card that costs 0 to play and it has one black blaster pistol, and the enemy cannot defend. Can I therefore still attack with a blast on an objective since I get the unopposed win while attacking?

Yes, unopposed just looks for defenders not combat icons.

Hi Nerdrulez,

You asked 3 times the same question differently :-)

During your deploy phase, you can play any Espo trooper you got in hand for free.

THEN

During your conflict phase you can engage 1 objective, you can declare any ready unit (your Espo's are) as attackers, your opponent declares defenders (or not), you edge battle, and alternatively starting by the edge battle's winner, you focus your ready participating unit one by one.

THEN

After each participating unit is focused to strike, and there is no defenders left (weither there was any or not), you get an unopposed bonus of 1 blast.

THEN

You can engage another objective you didn't engage before this turn, declaring as attackers any ready unit, and proceed as before.

This is fully described in the rulebook, and illustrated by te chart at the last pages

Please stop spamming the board with this question - if you need further clarification, please continue an existing thread, rather than just repeating yourself through multiple threads.

It could also be that there is a general misunderstanding about how conflict works. At the expense of sounding harsh, I would challenge the OP to read the rulebook section on how the conflict phase works. It will help you immensely, as well as answer all of the questions you have asked to this point.