Zombie Apocalypse
12 Achievements
200
8-10h
A Week To Live
Complete 7 days in any game mode without dying
25
How to unlock the A Week To Live achievement in Zombie Apocalypse - Definitive Guide
Never swap weapons as the shotgun is supreme on Infinite ammo. You can do this in MP, but it's not much easier then in Single player. You can get grabbed, but not killed.(lose a life). Note: You switch weapons with the D-pad with this modifier.
This one will be quite challenging. You need to stay alive for 7 days straight. Start over to Day 1 and start from there. When a zombie grabs hold of you, push in L3 and shake it a bit to get the zombie off of you. It shouldn't be too much trouble till you get to Day 7. Here is where the construction workers are introduced. Also, make sure you save as many uninfected as you can, since they're grasp you can't shake off.
NOTE: Multiplayer makes it a lot easier to stay alive.
Optional Way: See 'Hotter Than Hell'.
This achievement can be obtained by just starting a new game on Day 1 right when you have downloaded the full game. Simply play through and complete Day 7 without dying and the achievement will unlock.
You definitely have to stay on the move, so as to not get yourself surrounded by zombies. This will take a good bit of patience and if you don't get it after the first try, just keep at it, and with enough skill, it shouldn't be too difficult.