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