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