Ludexv2026.11.01-65114139Terraforming MarsOfficial rulebook ↗

Visitors

Loading…

Actions

The seven actions: play a card, standard projects, milestones, awards, blue-card actions, and turning plants and heat into terraforming.

Your turn

On your turn take 1 or 2 actions, in any combination — the same one twice is fine — or pass. Turns go round until everyone has passed.

ActionCost
APlay a cardThe card’s cost
BUse a standard project0–25 MegaCredits (M€)
CClaim a milestone8 MegaCredits (M€)
DFund an award8, 14 or 20 MegaCredits (M€)
EUse a blue-card actionWhat the card says
FConvert plants into greenery8 Plants
GConvert heat into temperature8 Heat

Play a card

Three steps:

  1. Check the requirement. It must be met now; it doesn’t matter later. You must also be able to carry out the card’s effects, with three exceptions (below).
  2. Pay and do the effects. Pay the cost (top left), using Steel steel for building cards and Titanium titanium for space cards, minus any discounts. Then do the effects in the order you choose.
  3. Place the card: green face up in a stack, blue with its top panel showing, red face down in your event pile (card types).

Requirements

Requirements sit next to the cost. They are minimums — “3 oceans” means at least 3 — unless the box is red and says max, which means that value or lower. Some cards need a tag or a production.

The three exceptions

You may play a card even if you can’t do all of it when the part you can’t do:

Everything else must be possible: production decreases, removing your own resources, placing tiles.

Paying

Use a standard project

The six standard projects on the board are open to every player, and each can be used several times per generation.

ProjectCostYou get
Sell patentsDiscard cards from hand1 MegaCredits (M€) per card
Power plant11 MegaCredits (M€)+1 Energy energy production
Asteroid14 MegaCredits (M€)Raise Temperature temperature 1 step (+1 TR)
Aquifer18 MegaCredits (M€)Place an Ocean tile ocean (+1 TR, placement bonus)
Greenery23 MegaCredits (M€)Place a Greenery tile greenery (oxygen +1, +1 TR, placement bonus)
City25 MegaCredits (M€)Place a City tile city (placement bonus) and +1 M€ production

Claim a milestone

If you meet a milestone, pay 8 MegaCredits (M€) and put your marker on it. Each milestone can be claimed by one player only, and only 3 of the 5 can be claimed in total. Each is worth 5 VP.

MilestoneYou need
TerraformerTR of at least 35
MayorAt least 3 city tiles
GardenerAt least 3 greenery tiles
BuilderAt least 8 Building tag building tags in play
PlannerAt least 16 cards in hand when you claim it

Fund an award

Anyone may fund an award, no requirement. The first award funded costs 8 MegaCredits (M€), the second 14, the third 20. Only 3 awards can be funded, each once.

At the end every funded award is scored, whoever funded it: 5 VP for first, 2 VP for second (no second place with two players). Ties are friendly: all tied players get the VP; if several share first, there is no second.

AwardMost…
LandlordTiles in play (cities, greeneries, special tiles)
BankerM€ production
ScientistScience tag Science tags in play
ThermalistHeat Heat cubes
MinerSteel Steel and Titanium titanium cubes together

Use a blue-card action

Blue cards and corporations with a red arrow have an action. Each can be used once per generation: pay what is left of the arrow, take what it points to, and put a player marker on the card. Markers come off in the production phase.

Convert plants into greenery

Spend 8 Plants plants to place a Greenery tile greenery tile next to one of your tiles if possible. It raises oxygen 1 step and your TR with it, and you take its placement bonus.

Convert heat into temperature

Spend 8 Heat heat to raise the Temperature temperature 1 step and your TR with it.

Passing and stalling

If you take no action on your turn you pass and are out until the next generation. Some players take a single cheap action to wait and see what others do.

Rules

↑↓ to move · Enter to open · Esc to close

Drag to move · tap to close