Breakneck City (UP)

Kill 12 enemies with weapons. Press X to kick weapon holding enemies to knock it out of their hands. Pick it up with Y. Kick enemies until they have low health with X then press A to hit with your melee weapon
If this doesn't pop during your first playthrough, press start, press quit and start again on level 1
Play through and get more weapon kills. It should pop on your 2nd playthrough

I explain and show it better in my video
Achievement Walkthrough:

Is any one having issues with this and the 12 health tokens to unlock or is it just me? I popped the ones for beating 6 enemies with a weapon but not 12? Any ideas thanks! I also have tweeted the devs about this issue