Clean Stairs
Clean Stairs Info
| Category | Clean |
| Unlock level | 62 |
How to unlock
Clean Stairs is unlocked by the Futuristic Structure Set technology, available at level 62.
View the technology tree| Category | Clean |
| Unlock level | 62 |
Clean Stairs is unlocked by the Futuristic Structure Set technology, available at level 62.
View the technology tree