OUTBLAST

1. 
   System Purged

   Player completed every level
   4.5%
2. 
   Dehydrated

   Defeat Hydra boss in level 1
   22%
3. 
   Gorgone

   Defeat Gorgon boss in level 2
   15%
4. 
   Mine-no-more

   Defeat Minotaur boss in level 3
   10%
5. 
   Siren song

   Defeat Siren boss in level 4
   7.2%
6. 
   Typhon

   Defeat Typhon boss in level 5
   4.5%
7. 
   Clutched It

   Completed a wave with under 3 seconds left
   16%
8. 
   Rocket Man

   Kill 5 enemies with 1 boost
   14%
9. 
   Bug Squasher

   Kill 64 enemies with ultimate in one level
   0.9%
10. 
    Killer Byte

    Kill 1024 enemies
    25%
11. 
    No Errors

    Complete a level with no damage taken
    7.2%
12. 
    Feature Complete

    Fully upgrade your weapon
    6.3%
13. 
    Laggless Lap

    Complete a lap of the arena in under 6 seconds
    59%
14. 
    Stack Overflow

    Maintain a max multiplier for 3 minutes
    3.6%
15. 
    Storage Full

    Use 100 Pickups
    59%
16. 
    Insert Coin

    Complete arcade mode
    2.7%

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 16 of them.