A rocket fuel or propellant
Our answer book holds 47 answers to “A rocket fuel or propellant”, from the first thing anyone would say to names almost nobody would think of. The answers that come to mind first are Liquid Hydrogen, Liquid Oxygen and Hydrogen. They count, but they keep you close to the ground. It is a fairly short list: only 8 answers sit in the two rarest tiers, so reaching one takes real knowledge.
Space questions reward anyone who remembers the names behind the famous missions, not just the missions themselves. You will find it in stage 34, “Rocket Workshop”, of the Cosmos mission. The first stages of every mission are free, and later stages come with the full mission.
PLAY ONLYCLICK FREEThe most common answers
EVERYONE- Liquid Hydrogen
- Liquid Oxygen
- Hydrogen
- Kerosene
- Oxygen
- Solid Fuel
- Methane
- Hydrazine
- Cryogenic Fuel
- Xenon
- Gunpowder
- Alcohol
- Ammonium Perchlorate
- Nitrogen Tetroxide
- Monopropellant
These are the 15 answers we rate as most common, out of the 47 we know. They score the least. The other 32, including every rare one, stay inside the game.
How the 47 answers are spread
| EVERYONE | 8 |
| THE CROWD | 16 |
| SOME | 7 |
| A FEW | 8 |
| ALMOST NOBODY | 6 |
| ONLY YOU | 2 |
The rarer your answer, the farther your rocket flies. Rarity is our own estimate of how few people would think of an answer. How to play.