1

Foggy

2

Dusty

3

Rushing Water

4

Trickling Water

5

Noisy Machinery

6

Traffic Sounds Overhead

7

Dead Silent

8

Echoing

9

Crawling with Bugs

10

Changing Water Level

11

Slopes Resolve: {Downward|Upward}

12

Barrels

13

Burning Barrel

14

Ankle-Deep Water

15

Slick Floor

16

Encroaching Roots

17

Catwalk

18

Crates

19

Waste-Deep Water

20

Floating Platforms

21

Grate Above

22

Half-Pipe

23

Wires

24

Heavy Door

25

Hidden Nook

26

Alcoves

27

High Ledge

28

Ladder

29

Locked Door

30

Locked Gate

31

Low Ceiling

32

Loose Bricks

33

Multilevel

34

Murky Water

35

Filthy Water

36

Mossy

37

Narrow Ledge

38

Pipes Overhead

39

Pipes Underfoot

40

Huge Pipes

41

Water Tanks

42

Shaft

43

Garbage Heap

44

Stalactites

45

Stairs

46

Drafty

47

Tight Squeeze

48

Tilting Platform

49

Underwater Passage

50

Unfinished Construction

51

Waterslide

52

Makeshift Bridge

53

Floor Grate

54

Beams

55

Rubble

56

Load-Bearing Pillar