Here is the full list of all 53 Deadly Days achievements worth 1,000 gamerscore.
Collect 50 scrap in one day
Collect 100 scrap in one day
Find an uncommon weapon
Find a rare weapon
Find a legendary weapon
Buy something from the vending machine
Use 3 different special powers in a day
Search all houses on a mission
Heal a survivor that is almost dead.
Kill 15 zombies at once.
Equip at least 4 survivors with uncommon weapons
Equip at least 4 survivors with rare weapons
Equip at least 4 survivors with legendary weapons
Survive until night without healing a survivor
Shut down the Factory!
Find and loot a secret house
Defeat the boss: Jack "Jumper"
Defeat the boss: Sam "Slimey"
Defeat the boss: Frank "The Monster" Stein
Accumulate 250 Scrap
Use 200 airstrikes in a run
Hunt down each type of special zombie!
Kill 15 giant zombies in a run
Unlock and fill all item slots
Win a run with only one survivor living
Win a run without any survivor deaths
Win the final wave with only melee weapons equipped
Win a run without upgrading any items or powers
Win the final day with all equipped items and powers upgraded
Complete a specialization
Complete all basic specializations
Complete the challenge specialization
Unlock all entries in the encyclopedia
Find a map piece
Find all 4 map pieces
Have 40 or more food
Find and interact with 3 billboards in a run
Reach a threat level of 40
Let one banana explode
Complete the tutorial
Complete a run within the daily challenge mode
Reach 10000 points in a daily challenge
Destroy all trees on a mission
Survive until minute 5 during nighttime
Complete a run with only perfect days
Spend 150 scrap on vending machines
Find all weapons once
Have 3 drones equipped at once
Loot 100 houses in one run
Accumulate 30 tools
Upgrade a custom weapon to tier 5
Build all 3 rooms in the base
Finish the game by building the rocket and flying into space