Easy "Unharmed" Achievement...
	Various Steam Achievements...

After starting the tutorial and converting all citizens into zombies, group all your units in a location away from the police group. Then take one (only one) of your fast zombies (green clothes) to the enemy until one or two of them start following you and return to your group. The policemen will follow you and they will be attacked by the mob.

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Famous Boss	Kill Neilman - Prologue - Singleplayer Campaign.
Kamikaze	Eliminate 5 enemies at once with a zombie bomb.
Leaving the Desert	Unlock Level 5 - Prologue - Singleplayer Campaign.
Long life to Zombies	Convert 10 citizens in zombies.
Occupational Hazard	Kill an innocent civilian using any hero.
Prologue	Complete the Prologue - Singleplayer Campaign.
Unharmed	Complete any level without losing units - Singleplayer Campaign.