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