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