Unstoppable Machine is a side quest which offers rewards for upgrading the Siege Workshop.
| Requirement | Reward |
|---|---|
| Upgrade Siege Workshop to Level 2 |  1,000  750 |
| Upgrade Siege Workshop to Level 3 | 1,250 2,500 |
| Upgrade Siege Workshop to Level 4 | 2,000 3,250 |
| Upgrade Siege Workshop to Level 5 | 9,000 11,250 |
| Upgrade Siege Workshop to Level 6 | 6,250 8,750  4,250 |
| Upgrade Siege Workshop to Level 7 | 7,500 10,250 5,500 |
| Upgrade Siege Workshop to Level 8 | 9,750 13,250 7,500 |
| Upgrade Siege Workshop to Level 9 | 10,500 12,500 7,750 |
| Upgrade Siege Workshop to Level 19 | 178,750 233,000 156,750 |
| Upgrade Siege Workshop to Level 19 | 268,000 350,750 235,250 |