Level 1
A piece of a wall with swollen paint. Nothing serious, but it might become a problem soon.
Level 2
A piece of wall with heavily swollen paint. Water is seeping from the wall. You definitely need to do something about it. Wipe the floor, maybe.
Stations
Bonuses
Fuel consumption: 0.05Energy regeneration rate: -0.05Health regeneration rate: -0.05Additional raid experience: -0.03Skill group leveling: -0.03
Level 3
A piece of wall with heavily swollen paint. Part of the paint fell off. Water is seeping from the wall. There seems to be something behind this wall.
Stations
Bonuses
Fuel consumption: 0.05Energy regeneration rate: -0.05Health regeneration rate: -0.05Additional raid experience: -0.03Skill group leveling: -0.03
Level 4
A wall with a hidden door. You don't know who made it and why, but to open it, you will need tools. Also, another wipe wouldn't hurt.
Stations
Bonuses
Fuel consumption: 0.05Energy regeneration rate: -0.05Health regeneration rate: -0.05Additional raid experience: -0.03Skill group leveling: -0.03
Level 5
The damaged part of the wall turned out to be an entrance to the old hidden room. There is nothing inside but rubbish and a dead body. It will take a lot of effort to put this room in shape.
Stations
Bonuses
Fuel consumption: 0.05Energy regeneration rate: -0.05Health regeneration rate: -0.05Additional raid experience: -0.03Skill group leveling: -0.03
Level 6
A tidied up entrance to the new room.
Items
Stations
Bonuses
Fuel consumption: -0.2Energy regeneration rate: 0.2Health regeneration rate: 0.2Additional raid experience: 0.12Skill group leveling: 0.12