Here is the full list of all 31 Zombie Kill of the Week - there are Reborn achievements.
Go see your friends!
Survive 4 minutes in Arise. (Challenge mode)
Survive 4 minutes in Night At The Mall. (Challenge mode)
Survive 4 minutes in Area 73. (Challenge mode)
Survive 4 minutes in Homerun. (Challenge mode)
Get promoted to rank 30.
And still going?
Get a shotgun, and make 20 zombies crawl in front of you.
Survive 4 minutes in RedSnow. (Challenge mode)
Survive 4 minutes in Abandoned Hospital. (Challenge mode)
Find the fridge and make it disappear. Repeat 3 times.
Get 5 meats in a single game from the fridge.
Slaughter 10 000 zombies in total.
Get the GiGaGirlGannon, and kill 10 zombies within 10 seconds.
You have wasted 5 hours of your life.
Slaughter 5000 zombies in total.
Own atleast 5000$ in one match
Encounter all 3 tanks, and get them killed.
Slice 53 zombies in one match.
Grill 50 zombies with flame in a single match.
Kill 15 zombies with a katana, and 25 with saw in one match.
Fight your way to round 20.
Kill the zombie bear before he takes your money.
Get 100 headshots in one match.
Open all areas in a single match.
Get yourself killed with a grenade. Dumbass.
You have played ZKW for an hour.
Help your friend in need.
Stand still for 30 seconds, wondering about your life.
Get promoted to rank 10.
Zombies are not ment to fly.