Concepts is a game about combining pairs of concepts to create new, more complex concepts.
Try combining the two concepts below:
Once you create a new board, you start with the four classical elements:
Starting from here, you can combine concepts to build anything you can imagine!
Concepts extends the game Infinite Craft by Neal, introducing many new features: account syncing, multiplayer, collections, stats, leaderboards, concept complexity, and more! Keep reading to learn more!
The complexity is a number that indicates how many combinations are needed to reach a concept.
To compute the complexity of a new concept, you must take the maximum complexity of the two ingredients plus 1Say that:
A = complexity of ingredient 1
B = complexity of ingredient 2
C = complexity of product between A and B
Then:
C = max(A, B) + 1
In the example below:
max(6, 14) + 1 = 14 + 1 = 15, for example:
This way, each board has its own tree of concepts where each can have different complexities. This leads to interesting competitions, where you may be the only one holding the lowest complexity!
When you discover a better recipe (with lower complexity) for a concept, every recipe that depends on that concept will automatically recalculate and potentially improve!
For example, assuming you already discovered the recipe from above (Sea + Sun = Beach), if you now discover a better recipe for Sun:
then the complexity of Beach will improve as well, since you know that Sea + Sun = Beach:
This creates a cascade effect where a single discovery can improve dozens or even hundreds of concepts at once, making trying to discover novel recipes a fun challenge!
Collections are themed groups of concepts to discover. They help you organize your exploration, give you goals to work towards, and let you compete on leaderboards with other players.
Examples include Colors, Fruits, Animals, Planets, and many, many more. Each collection contains a curated set of related concepts waiting to be found.

Track your progress as you discover each concept, and challenge yourself to achieve the lowest total complexity for a collection. Compete on the leaderboards to see how your recipes compare to other players.
Can you complete them all?
Every collection has a leaderboard where boards are ranked based on the concepts they have discovered. There is a leaderboard for each collection, and a global leaderboard where boards are ranked across all collections.
Leaderboards are sorted like this:
| Rank | Board | DiscoveredMost discovered first The number of discovered concepts across all collections. | ComplexityThen lowest complexity The sum of complexities of all discovered concepts across all collections. |
|---|---|---|---|
| 1 | speedrunner_99 | 25/25Total number of concepts across all collections | 345 |
| 2 | concept_master | 17/25Total number of concepts across all collections | 152 |
| 3 | element_hunter | 17/25Total number of concepts across all collections | 164 |
| #42 | fun_enjoyer | 8/25Total number of concepts across all collections | 267 |
Go get the lowest total complexity!
Play together in real-time! Invite friends to your board and discover concepts together!
Share your craziest discoveries, trade recipes, and see what others are crafting!
Hey there! A few technical details that may be of interest to the most curious among you:
anthropic/claude-opus-4.5, but it's too expensive.