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