(adsbygoogle = window.adsbygoogle || []).push({}); I've completed the game once, and am going to use Xploder with a save for Insanity xD my question is, will using a save for my insanity run, will it still unlock Long Service Medal or not?

No unfortunately using the insanity save will NOT unlock Long Service Medal.
That trophy stats are locked to your user profile... so you need to complete each level on Insanity yourself.

It is a grinder trophy... but can definitely be done

Ah okay. That answered my question, cheers mate