Boardgame Mechanism Vocabulary
The shared names for the dozen-odd decision-shapes that hobby boardgames are built from.
Pick up three boxes from a hobby shelf and the surfaces look nothing alike. The first is a vineyard in Tuscany. The second is a spreading plague. The third is a stained-glass window. Strip the art away and two of them may be running the same engine underneath. The same loop of choices wears different clothes. That loop has a name. Learning the names is what turns a player into a designer. Once you can say “this is worker placement and that is area majority,” you reach for a pattern on purpose instead of stumbling into it.
This article is a glossary. It catalogues the mechanism families that the modern boardgame hobby has settled on and given stable names, with a one-line definition and a game you can point to for each. It is a tabletop reference and nothing more. The patterns here live on a table in cardboard and dice. None of them carries over to a parser game or an escape room. Where the deeper design questions begin, the prose points you onward to the principle articles in this family.
The Mechanism (How it works)
What a mechanism is, and what it is not
A mechanism is a discrete rules pattern that organises player decisions. It sets out which choices are on the table, what limits apply, and what each choice leads to. It is worth being strict about what that excludes, because three other things get mistaken for it. Theme is the narrative skin, the castle or the colony, and you can peel it off without touching the decision logic. Components are the physical parts, the boards and meeples and dice. Genre, whether a game reads as a Eurogame or as Ameritrash, is community shorthand for a bundle of values, not a description of how the game actually works. The same mechanism turns up across wildly different themes and genres, which is exactly why naming it separately is useful. The split lets you ask “what decisions does this game create?” apart from “what is it about?” and “what does the box look like?”, and that separation is the ground of literate design criticism.
The hobby has built a shared catalogue of these patterns. BoardGameGeek’s mechanism index is the de-facto reference, and it now tags well over a hundred distinct mechanism types. No single game uses more than a handful. What follows is not the whole index but the load-bearing core, the families a designer meets first and combines most. The table is the spine of this article. In a single-mechanism article the body would be prose. A glossary is tabular data instead. Each row needs three columns at once. One gives the family name. Another gives what the mechanism does to a turn. The last gives a game that defines it. Only a table holds all three together without burying any.
| Mechanism family | One-line definition | Defining example |
|---|---|---|
| Worker placement | Players place limited worker tokens on action spaces, taking the benefit and blocking others from that space this round | Caylus (2005); Agricola (2007) |
| Deck-building | Each player starts with a small identical deck and buys new cards into it during play, so the deck is both the strategy and the resource | Dominion (2008) |
| Engine-building | Players assemble a tableau of permanent parts that each generate resources or effects, so productive capacity compounds over the game | Wingspan (2019); Terraforming Mars (2016) |
| Area control / area majority | Players place pieces across a map of regions; whoever holds the most pieces in a region scores it at set moments | El Grande (1995) |
| Set collection | Players gather matching or complementary cards or tiles and score for completing defined sets, runs, or coverage | Ticket to Ride (2004); 7 Wonders (2010) |
| Drafting | Each player picks one item from a shared pool and passes the rest on, repeating until the pool empties | 7 Wonders (2010); Sushi Go! (2013) |
| Tile placement / polyomino | Players lay tiles onto a grid under adjacency or shape rules, scoring from the spatial patterns they make | Carcassonne (2000); Patchwork (2014) |
| Auction / bidding | Players win contested resources through structured competitive bids, so estimating relative value becomes the core skill | Modern Art (1992); Power Grid (2004) |
| Network / route building | Players claim connections between nodes on a map; scoring rewards the length, coverage, or connectivity of the network | Ticket to Ride (2004); Brass: Birmingham (2018) |
| Hand management | Cards in hand are a scarce resource, and the decision is which to play, when, and in what order | Bohnanza (1997); Race for the Galaxy (2007) |
| Push-your-luck | A player may keep gambling accumulated gains for more, risking the loss of what they hold if a bad result lands | Can’t Stop (1980); Quacks of Quedlinburg (2018) |
| Action point allowance | Each player gets a budget of action points per turn to spend across a menu of differently priced sub-actions | Eclipse (2011); Twilight Imperium (2017) |
| Dice placement | Dice are rolled, then assigned as workers to spaces, with each die’s face deciding which spaces are valid or what they yield | Sagrada (2017); Castles of Burgundy (2011) |
| Roll-and-write / flip-and-write | A shared roll or flip is revealed and every player marks it on their own sheet at once, so downtime is near zero | Welcome To… (2018); Cartographers (2019) |
| Cooperative | All players share one win and one loss condition, turning the contest from player-versus-player into players-versus-system | Pandemic (2008); Spirit Island (2017) |
| Trick-taking | Each player plays one card to a central trick; the highest in the led suit (or a trump) wins it, often under a bid | The Crew (2019); Spades |
How the families group
The fifteen-odd names are easier to hold if you sort them by what they actually do to a turn. One cluster is about acquiring things under contest. Drafting, auction, and worker placement are all ways of fighting over a limited pool, but they fight differently: a draft passes the pool around so the loss is what your neighbour denies you, an auction settles the contest with bids and so turns on reading value, and worker placement makes the loss spatial, since taking a slot blocks it for everyone else this round. The tension worker placement designs around is valuing access over the immediate return, which is the same problem auctions pose in the language of money. The grammar of choice underneath all three is Decision-Space & Choice Design.
A second cluster is about building something that pays off later. Deck-building, engine-building, and network building all reward early investment that concedes present tempo for future scaling, and they share a characteristic late-game shape where the player whose engine reaches self-sufficiency first runs away with it. Deck-building and engine-building overlap so often that the distinction is worth drawing in the prose where it bites: deck-building’s tableau is your shuffled deck and the skill is its composition, whereas a pure engine sits face-up on the table as permanent infrastructure. The family article that treats the deck-builder as a form in its own right is Deckbuilders.
A third cluster turns randomness into a decision rather than letting it decide for you. Push-your-luck hands the player the gamble directly and asks when to stop. Dice placement rolls first, then makes the roll an opportunity landscape to be worked, so skill shows in how well a player uses a random input rather than in dodging it. Roll-and-write does much the same with a shared sheet. Its quiet virtue is that it scales without slowing. A six-player game runs no slower than a two-player one, because everyone marks the same revealed result at once. How much of a game’s interest should come from the randomiser and how much from the structure around it is the question in Elegance, Emergence & Randomness.
The remaining families are best read as scoring or structural skeletons that the others hang on. Set collection is the dominant scoring architecture of gateway games because its target state is always visible, and it rarely stands alone: it borrows drafting or hand management to supply the acquisition layer beneath it. Area majority and tile placement are spatial scoring frames. The cooperative and trick-taking families are structural. Cooperative play resets the social contract of the table from rivalry to shared cause. Trick-taking is an old card grammar that modern design keeps finding new uses for, most strikingly when The Crew bent it into a cooperative puzzle of limited communication. Whether the chosen skeleton sits naturally with the game’s subject, or fights it, is Theme-Mechanism Integration.
Mechanisms get combined
Almost no published game runs on one family. The interesting designs layer two or three, and the combinations are where the craft sits. Everdell sets a card tableau on top of worker placement; Terraforming Mars runs an engine inside a tile-placement map; Caylus puts an action-point limit on top of its worker placement as a second constraint. Set collection is a passenger mechanism above all: it needs a drafting or hand-management layer to feed it. So the working use of this glossary is not to file a game under one heading but to read off the stack of patterns it combines, and then to reason about how those patterns push against each other across a turn. The economy that decides how many of these actions a player gets, and in what order, is Turn Structure & Action Economy.
Pandemic (Matt Leacock, 2008) is the cleanest place to watch one of these families do its structural work. As the anchor of the modern cooperative form, it gives every player the same win condition (cure four diseases) and the same loss conditions (too many outbreaks, the deck runs dry), then lets them manage a spreading network of infection together. What it also exposes is the family’s signature failure, the alpha player problem: because all information is open and all goals shared, one forceful player can quietly direct everyone else’s turns, collapsing a cooperative game into a solo game with spectators. The mechanism creates the table’s best feeling and its worst habit in the same stroke, so “cooperative” names a structural choice with real consequences, not just a friendlier mood.
Where this fits
The bigger picture. This glossary sits at the entrance to the tabletop side of the Systems & Mechanics family, below the principle articles rather than beside them. It does one job. It gives the patterns stable names so the rest of the conversation can happen. Once you can say which families a game combines, every other tabletop article becomes usable. Each of them reasons about mechanisms in the abstract and takes for granted that you can already point at the concrete ones on the table. The vocabulary is also a guard against a common beginner error. That error is treating the theme or the components as the design when the decision-shape underneath is the thing that actually plays. Naming the mechanism is what lets you tell those three apart.
Next steps. With the names in hand, the natural next move is from catalogue to craft. To ask why any of these families produces good decisions at all, go to Decision-Space & Choice Design; to weigh how much a game should lean on its randomiser, Elegance, Emergence & Randomness. When a chosen mechanism has to carry a subject convincingly, that fit is Theme-Mechanism Integration, and the two broad design cultures that favour different families are mapped in Euro vs Ameritrash: The Two Design Poles. For the deck-builder treated as a form of its own, Deckbuilders; for the economy of actions any of these patterns runs inside, Turn Structure & Action Economy; and for how a designer keeps the combined stack worth playing more than once, Replayability.