Originally Posted by deexor
There are 28. One of them is actually off screen, and you have to bomb it down to get it.
Number 12 is off screen. The ones marked green you will need to destroy twice.
Try it out in Training a few times first, it's quite tricky even when you know what you're doing.
Oh wow. Thanks for posting this!
I don't think I'll ever be able to do it lol but I'm sure this will help others.
Edit: I wish there was more clarification on which achievements can be done on Novice and/or other modes. Why put "(Novice Mode not allowed)" only on some of them? It would be nice to know what is the best mode for each achievement. I know, I suck lol.