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