How to play Terraforming Mars
1–5 players · 120 min · weight 3.27
Terraforming Mars is a card-driven engine-building game for 1–5 players in which corporations compete to make Mars habitable by raising its temperature, oxygen, and ocean levels. Designed by Jacob Fryxelius and published by FryxGames/Stronghold Games in 2016, it became one of the hobby's defining games of the decade — an engine builder of enormous scope where hundreds of project cards interact in emergent and surprising ways. Each corporation has a unique starting condition, and the project cards drawn each game (from a deck of 208+) create entirely new strategic configurations. Terraforming Mars plays in 90–120 minutes for 2–4 players and is renowned for the richness of its card interactions, though its older graphic design and long playing time are frequently noted as weaknesses.
How to play
Setup: Each player chooses or is dealt a corporation card (with a unique starting ability and resource allocation) and 10 project cards. Keep any project cards you want to start with by paying 3 MegaCredits (MC) each; discard the rest. Gain your corporation's starting resources and place production cubes on the resource tracks: MC, Steel, Titanium, Plants, Energy, and Heat. Resources and production: Six resource types. MegaCredits (MC) are currency — you gain your income each generation (round). Steel and Titanium are discounts on building and space project cards. Plants become forests (greenery tiles); Energy converts to Heat at start of each generation; Heat terraforms temperature. Each generation: 1. Player order: Pass the first-player marker. 2. Research: Draw 4 project cards; keep any for 3 MC each, discard the rest. 3. Action phase: Players alternate taking 1–2 actions per turn until all pass. Actions: Play a project card (pay its MC cost minus applicable steel/titanium discounts); Use a standard project (fixed-cost actions on the board — place ocean, raise oxygen, convert plants to greenery, convert heat to temperature); Use a card action (blue-bordered cards have once-per-generation actions); Claim a Milestone (first player to meet a milestone condition claims it for 5 VP); Fund an Award (pay 8/14/20 MC to claim; highest in that category scores at game end). 4. Production: Gain all six resources based on your current production levels. Terraforming: Oxygen, temperature, and ocean placement each raise your Terraform Rating (TR) by 1, which is worth 1 VP at game end. TR also contributes to income (each TR = 1 MC per generation). Game end: When all three global parameters are complete (14% oxygen, 8°C temperature, 9 oceans placed), finish the current generation and score: TR, greenery tiles (1 VP each + adjacency bonuses), city tiles (1 VP per adjacent greenery), project card VP, milestones (5 VP each), and awards (5/2 VP for first/second in funded categories).
Strategy
Terraforming Mars rewards players who identify strong card synergies early, scale production efficiently, and balance their personal engine with global terraforming contributions. Corporation selection defines your game: Each corporation creates different optimal strategies. Helion has extra heat production and can pay heat as MC — build temperature-heavy strategies. Mining Guild gains steel bonus from placing tiles — prioritize building projects. Tharsis Republic gains MC every city placed and synergizes with city-heavy builds. Understand your corporation's bonus before evaluating project cards. Production is compounding: Every production cube you add multiplies through every remaining generation. A +3 Plant production gained in generation 3 of a 10-generation game is worth 21 plants total. Prioritize production over one-time effects in early generations; one-time bonuses are better in later generations when fewer turns remain. Card drafting is strategy filtering: The research phase draws 4 cards and lets you buy any you want for 3 MC each. Unplayed cards in your hand are pure cost — buy only cards you have a realistic plan to play this game. Cards with expensive synergy requirements (need 5 building tags to activate) are only worth buying if you are already pursuing that synergy. Milestones and Awards: Five milestone slots for 5 VP each are first-come-first-served — if you are close to a milestone condition (e.g., Gardener requires 3 greenery tiles), claim it before it becomes contested. Awards are funded rather than earned — you pay to create a scoring category, then score if you're leading it at game end. Fund awards you already lead, not ones you hope to lead later. Balancing engine vs. terraforming: A player who builds an enormous production engine but ignores global parameters contributes less TR and may have lower income than a terraform-first player. Balance is key — cards that simultaneously advance parameters and build your engine are the most efficient.
Tips
- Play only project cards that fit your corporation's strategy; buying unplayable cards is a 3 MC loss each research phase. - Production compounds — every cube of production added early is worth far more than the same cube added late. - Steel and Titanium are discounts, not resources; use them only on eligible card types (building/space tags) to maximize their value. - Claim milestones as soon as you qualify — a competitor may meet the same condition one generation later. - Fund Awards you are already winning; funding an award you trail in is a donation to your opponent. - Converting plants to greenery raises oxygen AND scores 1 VP per tile — prioritize this over heat conversion unless temperature is the blocking parameter. - City tiles score 1 VP per adjacent greenery at game end; place cities where future greenery will surround them. - The game often ends earlier than expected once two parameters are nearly complete; plan your VP-scoring push 3–4 generations before the end.
Player count & time
1–5 players in 90–150 minutes. The solo mode (beat a fixed TR target by generation 14) is well-designed. At 2 players the game is fastest and most strategic; at 5 it is long and more chaotic. Most experienced players prefer 2–3 player games.
Terraforming Mars: Ares Expedition
A streamlined card game version of Terraforming Mars that plays in 45–60 minutes with the same card interaction depth but a simplified board. Recommended as an entry point for players who find the base game's playing time daunting.
Expansions
Hellas & Elysium adds a two-sided board with different milestone/award configurations. Venus Next adds a Venus parameter track. Prelude adds powerful starting cards that dramatically accelerate early game development. Colonies adds trading posts on moons of Jupiter. Most groups add Prelude first — it significantly reduces the slow early-game pacing.
Common beginner mistake
Buying every interesting project card in the research phase regardless of synergy, then running out of MC to play them. Be selective — a hand of 8 playable cards is more powerful than a hand of 15 cards of which only 6 fit your strategy.
Sources & attribution
- https://www.fryxgames.se/games/terraforming-mars/
Original how-to-play summary — not a substitute for the official rulebook.