0 day Attack on Earth

Since this is still showing as a secret achievement....
The title is "May Day King"
And the description is "Got Shot Down 256 Times"

This is a pretty straightforward achievement, though you don't actually need to be hit with a projectile to be "shot down" just blow up/crash 256 times.

There is a way to grind this achievement out along with the "Ruler of the Universe" Achievement for earning every rank. Simply beat the game, load up the last level (Paris Day 7) on Hard and crash into the final boss three times - making sure to use all your bombs on the boss before you die each time. Then with your last life finish off the boss - you will get 3 deaths and slowly rank up.

If you already have the other achievement, simply load up any level on Hard and purposely die 4 times, you will be demoted but you will get this achievement a little faster.

Dying while fighting the final boss is a good way to hit two birds with one stone.

But leveling up takes much, much longer.

If you have a turbo controller your best bet is to start up the final level on hard and turbo the button. The AI will kill you and it will restart the level.

This way you can get deaths while sleeping and level up quicker while awake.