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