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