106
warfare
× 11 |
22
space
× 8 |
8
technological-development
|
5
trans-humanism
|
102
reality-check
× 9 |
21
environment
× 2 |
8
modern-age
|
5
humans
|
99
weapons
× 6 |
20
post-apocalypse
× 3 |
8
medieval
|
4
futurology
× 3 |
89
combat
× 2 |
16
space-elevators
× 2 |
8
tactics
|
4
alternate-worlds
× 2 |
81
shapeshifters
|
16
space-constructs
× 2 |
7
merfolk
× 2 |
4
antimatter
|
81
dragons
|
16
medieval-europe
|
7
super-powers
|
4
fuels
|
79
magic
× 4 |
14
cataclysms
|
6
religion
|
4
chemistry
|
34
apocalypse
× 4 |
11
simulated-worlds
|
6
aliens
|
4
gravity
|
29
society
× 5 |
10
science-fiction
× 3 |
5
food
× 2 |
4
ghosts
|
28
technology
× 9 |
10
earth-like
× 2 |
5
artificial-intelligence
× 2 |
4
architecture
|
27
science-based
× 11 |
8
physics
× 3 |
5
government
× 2 |
4
archaeology
|
25
time-travel
× 4 |
8
faster-than-light
× 2 |
5
economy
|
4
explosions
|
24
zombies
× 2 |
8
space-travel
× 2 |
5
geography
|
4
weapon-mass-destruction
|