Technophile help
 

How do I get this? I did five missions using six different gadgets, yet this doesn't unlock. What am I doing wrong? Usually at the start of missions, I just throw the gadgets at the background. Does that not count? Do I have to throw it at enemies, or what?

That must be it. I wasted 6 gadgets on nothing for 5 missions and got it, but I was throwing grenades at the ground and using the sound generator, health etc.

If anyone else has trouble be sure your not making the dumb mistake I did my first playthough. If you are using remote mines not only must you throw them but you must also detonate them. I was a complete idiot and just threw them my first playthrough but didn't blow them up and it didn't pop I was so mad then I realized my stupid mistake and did it the same way with the same gadgets my second time round only I detonated the remote mines this time & it poped immediately.

That ended up being my problem too.

I've try every gadget, and still no achievement!?!
:locked

How far into the game do have to be to get enough gadgets to do this achievements. Just looking for a rough guide.