| Unlockable: | How to unlock: |
| Anvil (15) | Complete the third mission on normal difficulty or higher. |
| Captains of Industry (15) | Complete the second mission on normal difficulty or higher. |
| Darkness Falls (15) | Complete the first mission on normal difficulty or higher. |
| Graveyard (15) | Complete the fourth mission on normal difficulty or higher. |
| History Repeats (15) | Complete the final mission on normal difficulty or higher. |
| Living Quarter (15) | Complete the sixth mission on normal difficulty or higher. |
| The Mountain King (15) | Complete the fifth mission on normal difficulty or higher. |
| Anvil - Ironman (20) | Complete the third mission in a single session without dying. |
| Captains of Industry - Ironman (20) | Complete the second mission in a single session without dying. |
| Darkness Falls - Ironman (20) | Complete the first mission in a single session without dying. |
| Graveyard - Ironman (20) | Complete the fourth mission in a single session without dying. |
| History Repeats - Ironman (20) | Complete the final mission in a single session without dying. |
| Living Quarter - Ironman (20) | Complete the sixth mission in a single session without dying. |
| The Mountain King - Ironman (20) | Complete the fifth mission in a single session without dying. |
| Anvil - Stopwatch (25) | Complete the third mission in under 25 minutes. |
| Captains of Industry - Stopwatch (25) | Complete the second mission in under 25 minutes. |
