What are the most complex categories in Little Alchemy 2?

In Little Alchemy 2, the most complex categories are typically those that require multiple steps and combinations to unlock. These categories often involve creating advanced or abstract elements, such as Philosophy, Time, Life, or Universe. Here's a breakdown of the most complex categories and how to approach them:

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1. Philosophy
- Philosophy is one of the most complex elements in the game, requiring a long chain of combinations.
- Key steps to create Philosophy:
1. Create Human (combine Earth + Life).
2. Create Idea (combine Human + Light Bulb).
3. Create Philosophy (combine Idea + Human).

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2. Time
- Time is another advanced element that requires several steps.
- Key steps to create Time:
1. Create Sand (combine Stone + Air).
2. Create Glass (combine Sand + Fire).
3. Create Hourglass (combine Glass + Sand).
4. Create Time (combine Hourglass + Life).

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3. Life
- Life is a foundational element for many advanced combinations.
- Key steps to create Life:
1. Create Energy (combine Fire + Fire or Air + Air).
2. Create Swamp (combine Mud + Plant).
3. Create Life (combine Energy + Swamp).

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4. Universe
- Universe is one of the most complex and final elements in the game.
- Key steps to create Universe:
1. Create Galaxy (combine Star + Star).
2. Create Solar System (combine Sun + Planet).
3. Create Universe (combine Galaxy + Galaxy or Solar System + Solar System).

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5. Human
- Human is a key element for creating many advanced items.
- Key steps to create Human:
1. Create Life (see above).
2. Create Clay (combine Mud + Stone).
3. Create Human (combine Life + Clay).

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Tips for Tracking Progress:
- Use the Encyclopedia in the game to track which elements you've discovered and which ones are missing.
- Focus on creating foundational elements first (e.g., Life, Human, Energy) to unlock more complex combinations.
- Experiment with combining elements in different orders, as some combinations may have multiple pathways.

By systematically working through these categories and focusing on the foundational elements, you can gradually unlock the most complex items in Little Alchemy 2.