Headplode

http://www.newgrounds.com/portal/view/545643

Start at level 27
96 07 00 08 02 07 01 00 00 00 =>
96 07 00 08 02 07 1b 00 00 00

Just finish the last level without any missing and failing and you'll have all hard achievable medals.

1 secret medal: Miss 100 times

This post was imported from an account that no longer exists!
Previous Name: phreneticus

Fail Madness: 96 02 00 08 65
First Plode: 96 02 00 08 4f

If you want to do it hard way, fail 50 times

The fail 50 times one can also be made easier by doing:
96 05 00 07 32 00 00 00 49 12 =>
96 05 00 07 01 00 00 00 49 12

Then fail once.