Sneak King
12 Achievements
200
15-20h
Xbox 360
Sneak King!
Complete all Challenges in entire game
25
How to unlock the Sneak King! achievement in Sneak King - Definitive Guide
Each area has 20 missions, the final mission is always roaming the area and delivering food to every individual without anyone passing out from hunger. It's easier than it sounds, though, because only one person is hungry at any given time. You can be seen by anyone but the person that is hungry during these missions. However, in the final area the 19th mission is as stated above, and the 20th is the same, without being seen by ANYONE (including those that aren't hungry).
I found a "Let's Play" series on Youtube. It may help with memorizing patterns and finishing the game. Thanks to Moldyjoe15 for making this little series.
Each level has 20 missions. 20 times four is 80 missions total. Remember that you don't need the best rank to beat the mission.