Moss & Mortar review

On the box, Moss & Mortar looks like the gentlest thing ever made. Soft greens, little snails, a wall with ivy curling over it. Then you play it and realise it is one of the most quietly devious spatial puzzles we have ever seen. Jonas called it “a tax return disguised as a garden”, and he meant it as a compliment.

You are each rebuilding a section of a crumbling stone wall. Stones are irregular tiles you must fit together, and the moss, which is the actual villain here, spreads across your wall each round, filling any gap you leave. Moss covers points. Moss blocks placements. Moss is the enemy. Also the moss tokens are adorable felt pieces, which feels deeply unfair.

Setting it up

Each player takes a wall board, a garden ledger for scoring, and a handful of starting stones. A central market board holds a rotating display of stones, and a cloth bag holds the moss tokens. Setup takes about three minutes. The game also comes with a small deck of Gardener cards that give each player a different secret scoring goal, which you deal out at the start.

The components are lovely. The stone tiles are thick and have a slightly rough texture printed on them, the felt moss pieces are soft and odd and wonderful, and the snail meeples (which mark your score) are the best little wooden pieces we own.

How it plays

On your turn you take one stone from the market, paying for it by moving your snail backwards on the time track. Stones further along the market are cheaper but less useful. Then you place the stone on your wall. It must touch at least one existing stone and cannot overlap moss.

After every player has placed, the moss phase begins. You draw moss tokens from the bag and place them on your wall according to a pattern printed on the round card: the moss grows into the largest gap, or along the top edge, or next to any stone of a particular colour. Each moss token covers one square permanently.

And this is where it gets tricky. Gaps are inevitable, because the stones are irregular. So you are not trying to build a perfect wall; you are trying to control where the imperfections are, so that when the moss arrives it lands somewhere harmless. Sometimes you deliberately leave a gap as bait. Sometimes the round card surprises you and the bait becomes a disaster.

The game lasts eight rounds. At the end, you score completed rows, colour groups, your secret Gardener goal, and lose points for every moss token on your wall. A two-player game takes about thirty-five minutes; a four-player game, about forty-five.

What we loved

Jonas played the solo mode forty-something times in the summer of 2024 and kept a little notebook of his scores, with smiley faces for good games. It was very sweet. Then I beat his best score on my first try and he did not speak to me for most of a Sunday. It is a puzzle that rewards a particular kind of brain, and it is the sort of game you think about while washing up.

What didn’t land

We fixed the Gardener imbalance with a draft: deal two goals to each player, keep one, and pass the other. It adds a minute to setup and makes the start of the game more interesting. Four-player games simply play slower; we mostly play it at two now, which is where it shines.

The good

The moss as an opponent. Leaving bait gaps for it to fill is a uniquely satisfying puzzle.
The solo mode, which adds a “weather” deck and an aggressive moss bag, is excellent and very tough.
Low interaction but not zero: the shared market means you sometimes take a stone purely so your neighbour cannot have it.
The felt moss and snail meeples. Pure joy to touch.

The not so good

With four players, there is a lot of waiting while people agonise over placements.
Some Gardener goals are much easier than others.
The theme is lovely but it never really affects play; the moss could be anything.
Very little to talk about between turns. It is a quiet game.

Who it’s for

Get it if…

Couples, solo players, puzzle lovers, anyone who enjoys games like a well-made jigsaw with a mean streak.

Skip it if…

You need direct interaction or conversation to enjoy a game, or you play mostly at four.

The verdict

Moss & Mortar is a quiet treasure. It looks like a soft, cosy game, and it is, but underneath is a sharp spatial puzzle with a genuinely original opponent. It is at its best with one or two players, short enough for a weeknight, and pretty enough to leave out on the table afterwards. The moss always wins in the end. The trick is deciding where.

Score breakdown

Theme & art

Rules clarity

Meaningful decisions

Replay value

Table talk

Components

Overall: 8.4 out of 10. The overall score is not an average; it is how keen we are to get it back on the table next Thursday.