Add your theme suggestions to the list below. Double check that a theme wasn't used in a prior competition here. If you need ideas, you can refer to the suggested themes archive.
As a general rule, try to avoid themes that either require specific cultural knowledge (including sports), or impose implementation limitations (like “2-bit color”). Please use alphabetical ordering so it's easy to see if a theme is already on the list.
3D Glasses
8 Eyes
A day in the life of…
Abstract
Adaptation
Adjectives
Aliens
Alexander the Great
All Humans are dead
All Natural
Angular Momentum
Antonyms
Apocalypse
Armada
Arms Race
Ascension
Autobiography
Bad luck
Baked Goods as Characters
Baked Goods as Weapons
Balance
Beards, Moustaches and crazy facial hair
Betrayal as a gameplay mechanic
Birds
Black Holes
Board Games
Bugs
By our powers combined…
Castles
Cat and Mouse
Claymation * A day in the life of…
Climate Change
Clouds
Coincidence
Cold or Frozen
Collective Action
Coloring
Combined Arms
Competition
Contrast
Construction
Crab people
Create or alter the laws of Physics
Cruel World
Crustaceans vs Cetaceans
Cyber warfare
Curses
Cute fluffy animals
Death
Deception
Delegation
Distribution of knowledge
Disjoint
Doors
Dreaming
Drinking
Dynamic Changing Characters
Dwarves
Eat it Before it Eats You!
Eating
Electricity
End of the World
Enemies of the Mind
Epic
Everyone is a Friend
Evolution
Existentialism
Exploration
Fighting
Flags
The Fleet
Flying Pigs
Food
Friends Forever! Never apart!
Futility
Gel Substances (I.E.: Modelling stuff with gels (Like, a 3D Spring, as the math goes - Spring/string is 1D, cloth 2D, Gel 3D)
Ghosts
Gliding
Gravity
Greek Mythology
Hercules
History
History Rewritten
The Hive Mind
Holes
Horror
Hyperspace
Illusions
Influence
Instant Death
Intensity
Intentionally broken
Inversion
Invulnerability isn't all it's cracked up to be
Irreplaceable
Isolation
Jailbreak
Jargon
Gelatin
Gentlemen, you can't fight in here, this is the war room!
Kittens
Knowledge
Late partygoers
Letting go
Limbs like these are hard to use
Loss
Magnetism
Maze/Labryinth
Mechanics and Gears
Melancholy
Mirrors
Morocco
Monocles
Moustaches
Music
Narrative (tell a story)
Naked men
Negative Space
No Gravity, no Friction
Non-Newtonian Physics
Opposites
Organisation
Paints and Brushes
Pandemic
Parallel
Peak Oil
Perpetual Motion
Photography
Portals
Power Outage Calamity
Planets
Player-generated story
Poetry
Pop
Power Outage
Prehistoric madness
Preparation
Programming things in one way or another
Psychedelic
Psychology
Punk
Pyrrhic Victory
Rabbits
Rain
Regression
Reptiles
Role Reversal
Roman Mythology
Romance
Sand
Science Fiction
Shakespeare
Shapeshifting
Shoes
Simulation and Persistence
Snakes on a plane
Sneaking
Snow
Spacemarine
Spaceships
Spaceship Earth
Spiders
Sports which could never exist
Stick Figure Death Theatre
Stone Age
Submarines
Surrealism
Sympathetic Antagonist
Swine Flu
Tentacles
The [fill in blank]est Hero Ever!
The Speed of Light
Time
Timewarp ← Is RHPS cross-dressing encouraged?
Top hats
Towlr
Turn-Based Eating
Trading
Translucency
Trash
Treasure Hunt
Twilight fandom (a first person squee-er?)
UFO
Unnameable
Unwanted Powers
Unwinnable War
Vector Field Flows
Vector Flow Fields
Vicarious interaction through another player
Video / Webcam
Vikings
Volcanoes
Warped
Water
Whodunnit
Wild animals
Winnable War
Winter
World's worst superhero
Worms
Wormholes
Yin and Yang
You are a cat
You are an unstoppable death machine
Zombies
Zoophobia
