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