What is this deck?
A free 72-card Forehead Party deck about terraforming Mars — planetary science, colony engineering, and the engine-building vocabulary of a long strategy game night.
Free deck · 72 cards
Mars Terraforming Guessing Game
Thin atmosphere, big plans. Mars Terraforming is a free 72-card Forehead Party deck of red planet science and engine-building table talk — domes and reactors, launch windows and victory points — for the friends who argue about colonizing a planet for fun.
For the group that finishes a four-hour board game and starts another
The colony charter is signed. Start clueing.
Mars Terraforming is a free Forehead Party deck of 72 cards split between real red planet science and the language of a long strategy game night. One half is planetary: Olympus Mons, Valles Marineris, polar ice caps, perchlorate soil, orbital mirrors, algae bioreactors, lava tube bases, and the airlocks and life support that keep a habitat dome breathable. The other half is table talk: engine builder, hand management, draft pick, victory points, point salad, last round.
It plays entirely offline with no account, no ads, and no subscription — recognizable words, no invented jargon, and nothing that requires having read the science.
Play it as a warm-up before a heavy strategy game, as a cooldown after one, at a launch-watch party, or with any group that treats space engineering as a good time.
A few cards from the deck
Clue these before the last round.
- Olympus Mons
- Polar Ice Cap
- Dust Storm
- Habitat Dome
- Airlock
- Hydroponic Farm
- Solar Array
- Rover Convoy
- Launch Window
- Space Elevator
- Engine Builder
- Victory Points
How to play
Low gravity, high volume.
- Pick the deck. Open Mars Terraforming and choose a round length.
- Hold the iPhone out. Put it against your forehead with the screen facing your friends.
- Guess from their clues. Tilt down when you get the card and tilt up to pass.
- Pass the phone. Compare scores once every player has finished a round.
Mars deck questions
Before the supply drop lands
Is it free?
Yes. It ships with Forehead Party at no cost — no subscription, no ads, and no purchase required to play it.
Who is it for and when should we play it?
Space nerds, board game groups, and science classrooms of grown-ups. It works as a warm-up before a long strategy game, a cooldown after one, or a launch-watch party filler.
How do you play?
Hold the iPhone to your forehead so everyone else can read the card. Friends give clues without saying the word. Tilt down for correct, tilt up to pass, then hand off the phone.
Do we need to know real Mars science to play?
No. Cards use words a curious person already recognizes — ice caps, dust storms, solar arrays, greenhouse gas — and the game-night half needs no science at all.
One more round before the last supply drop