Outpost: Infinity Siege

1. 
   I Can Still Save Him!

   Save a missing operative.
   17%
2. 
   Sneaky Bastard

   Open a locked container using a lockpick.
   42%
3. 
   Kneel Before Me

   Exploit Kronos' weakness and make him kneel down.
   32%
4. 
   Operation Starfall

   Clear level [Into the Abyss] for the first time.
   94%
5. 
   New Arrival

   Clear level [Outpost 11] for the first time.
   83%
6. 
   Rescue

   Clear level [Rescue] for the first time.
   54%
7. 
   The Nebulas

   Clear level [The Nebulas] for the first time.
   40%
8. 
   Seraph

   Clear level [Seraph] for the first time.
   34%
9. 
   Moving Fortress

   Reach an Outpost value of 10000.
   57%
10. 
    Battleship on Land

    Reach an Outpost value of 50000.
    38%
11. 
    Behemoth

    Reach an Outpost value of 100000.
    34%
12. 
    Veteran

    Reach level 30.
    46%
13. 
    Wasteland Hoarder

    Recover items worth 3000R in a single Recovery.
    54%
14. 
    Old Soldiers Never DieSecret

    Steam withholds the description of a secret achievement.
    5.6%
15. 
    ResearcherSecret

    Steam withholds the description of a secret achievement.
    16%
16. 
    Full House

    Unlock all departments.
    50%
17. 
    One Shot One Kill

    Defeat 500 enemies by hitting the weak spot.
    16%
18. 
    Kronos Hunter

    Defeat Kronos for the first time.
    41%
19. 
    Crius Hunter

    Defeat Crius for the first time.
    24%
20. 
    Traveler

    Explore 10 different landmarks.
    18%
21. 
    SlayerSecret

    Steam withholds the description of a secret achievement.
    84%
22. 
    FlashSecret

    Steam withholds the description of a secret achievement.
    60%
23. 
    Live DangerouslySecret

    Steam withholds the description of a secret achievement.
    3.0%
24. 
    Flying Dutchman

    Do not touch the ground for more than 30 seconds.
    21%
25. 
    More Than a Flesh Wound

    Have a single round cost of more than 150.
    21%
26. 
    A Great JourneySecret

    Steam withholds the description of a secret achievement.
    30%

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 26 of them.