Z-Sector

1. 
   Welcome to Z-Sector

   Play the game for the first time.
   88%
2. 
   First Blood

   Kill your first zombie.
   80%
3. 
   First Step to Survival

   Survive the first wave in Solo mode.
   80%
4. 
   Brothers in Arms

   Play Multiplayer mode for the first time.
   28%
5. 
   One Tap

   Eliminate a zombie with a single headshot.
   76%
6. 
   Sharpshooter

   Achieve 100 cumulative headshot kills.
   16%
7. 
   Trigger Discipline

   Complete up to Round 10 with an accuracy rate of 80% or higher.
   12%
8. 
   CQB Master

   Eliminate 5 zombies in rapid succession at close range using an assault rifle.
   0.0%
9. 
   Trusty Sidearm

   Survive one wave using only a handgun.
   84%
10. 
    Tactical Reload

    Reload before the magazine is empty and kill an enemy within 3 seconds.
    52%
11. 
    Leg Meta

    Shoot a zombie's legs to reduce mobility and eliminate 50 of them.
    16%
12. 
    Clean Clearing

    Clear 10 waves without taking any damage.
    0.0%
13. 
    No One Left Behind

    In multiplayer, complete 10 waves with the entire team surviving.
    4.0%
14. 
    Covering Fire

    Shoot zombies approaching within 2 meters of a teammate to save them from danger.
    8.0%
15. 
    Crossfire

    Eliminate a zombie by dealing damage simultaneously with a teammate.
    8.0%
16. 
    Watch Your Fire!

    Accidental friendly fire detected.
    16%
17. 
    Eerie Corridors

    Play a total of 10 times.
    20%
18. 
    Master of the Cell

    Clear the wave without moving a single step.
    88%
19. 
    Z-Sector Cleaner

    Achieve 1,000 cumulative zombie kills.
    12%
20. 
    Ocean of Blood

    Achieve 10,000 cumulative zombie kills.
    0.0%
21. 
    Competitor

    Submit a score to the leaderboard system for the first time.
    72%
22. 
    High Roller

    Score over 100,000 points on the leaderboard.
    28%
23. 
    Out of Ammo, Not Out of Luck

    Get a kill with a melee attack while out of ammo.
    12%
24. 
    Spray and Pray

    Empty a full assault rifle magazine on full-auto without landing a single headshot.
    0.0%
25. 
    Crowd Control

    Eliminate 10 zombies simultaneously with a single rocket launcher explosion.
    0.0%
26. 
    Swordmaster

    Clear a wave without taking any damage, using only a katana.
    8.0%
27. 
    Gunslinger

    Achieve 10 consecutive headshot kills using a revolver without missing.
    0.0%

Names, descriptions and icons are the game’s own, as Steam publishes them; the share is how many owners have unlocked each, from Steam's global figures for 27 of them.