Editing Terraforming Mars (section)

==Project Cards==

Each card you can play has several properties: base cost, color/type, tags, prerequisites, effects, and endgame victory points.

'''Base Cost:''' The gold credit symbol in the top-left shows how much the card costs to play.

'''Color/Type:''' Green, blue, and red. Green cards resolve their effects when they are played, and then their tags remain in play for the rest of the game. Blue cards are like green cards, but they also provide either passive ongoing effects or provide you with a new type of action you can take. Actions on blue cards can only be used once per generation. Red cards are called "Events", and unlike green and blue cards, their tags only apply when playing them: once they've been played, their tags no longer count for anything.

'''Tags:''' You'll see these symbols in the upper-right corner. There's a bunch of different tags cards can have, and what they do often depends on what other cards are out there. For example, you might have a blue card that says "every time you play a card with a microbe tag, gain 1 plant". Or you might have a green card that says "gain 1 income for every space tag you have". Of particular note are the brown "Building" tag (you can spend Steel when playing them, and they contribute towards the Builder milestone), the black "Space" tag (you can spend Titanium to play them, and there are many blue cards that discount them), the white "Science" tag (contributes towards the Scientist award, and the most powerful cards in the deck all have science tag prerequisites), and the "Jovian" tag that looks like Jupiter (several cards in the deck grant 1 VP per Jovian tag while also having Jovian tags themselves, giving these cards a unique snowball potential).

'''Prerequisites:''' You'll see symbols for these in the upper-left corner, and a more detailed description written in parentheses in the card's text. You must meet the prerequisite to be able to play the card. Prerequisites are usually either: have temperature/oxygen/oceans above or below a certain level, or have a certain number of a certain type of tag in play.

'''Effects:''' Cards do what they say they do, which can be all sorts of things. Some cards require you to spend either resources or resource production as part of the action of playing them. For instance, Electro-Catapult requires you to reduce your energy production 1 step as part of playing the card. If you are unable to do so, you can't play the card yet.

'''Endgame victory points:''' If a card has these, it'll be in the bottom right inside of a little Mars symbol. These are added to your score at the end of the game. Some cards provide a fixed number, other time it will be variable based on certain conditions (for example, Immigration Shuttles gives 1 VP for every 3 cities in play).