What are the most rewarding hidden game content in Little Alchemy 2?

In Little Alchemy 2, the most rewarding hidden game content often involves discovering rare or complex elements that require multiple steps or creative combinations. Here are some of the most rewarding hidden elements and how to achieve them:

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1. Life
- Why it's rewarding: Life is a foundational element that unlocks many other advanced combinations.
- How to make it:
1. Combine Water + Water to create a Puddle.
2. Combine Puddle + Water to create a Pond.
3. Combine Pond + Water to create a Lake.
4. Combine Lake + Water to create a Sea.
5. Combine Sea + Earth to create Primordial Soup.
6. Combine Primordial Soup + Energy to create Life.

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2. Human
- Why it's rewarding: Humans are central to many advanced combinations, including tools, technology, and civilization.
- How to make it:
1. Create Life (see above).
2. Combine Life + Clay to create Human.

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3. Time
- Why it's rewarding: Time is a rare element that unlocks many advanced combinations, such as history, fossils, and dinosaurs.
- How to make it:
1. Combine Fire + Fire to create Energy.
2. Combine Energy + Primordial Soup to create Life.
3. Combine Life + Earth to create Soil.
4. Combine Soil + Life to create Plant.
5. Combine Plant + Fire to create Ash.
6. Combine Ash + Ash to create Dust.
7. Combine Dust + Fire to create Gunpowder.
8. Combine Gunpowder + Fire to create Explosion.
9. Combine Explosion + Explosion to create Time.

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4. Unicorn
- Why it's rewarding: Unicorns are a mythical and fun element to discover.
- How to make it:
1. Combine Horse + Rainbow to create Unicorn.
- To make Horse:
1. Combine Life + Land to create Animal.
2. Combine Animal + Grass to create Horse.
- To make Rainbow:
1. Combine Water + Fire to create Steam.
2. Combine Steam + Air to create Cloud.
3. Combine Cloud + Water to create Rain.
4. Combine Rain + Sun to create Rainbow.

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5. Philosophy
- Why it's rewarding: Philosophy is a complex and abstract element that requires multiple steps.
- How to make it:
1. Create Human (see above).
2. Combine Human + House to create Family.
3. Combine Family + Idea to create Philosophy.
- To make House:
1. Combine Human + Stone to create Tool.
2. Combine Tool + Wood to create House.
- To make Idea:
1. Combine Human + Light Bulb to create Idea.

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6. Corpse
- Why it's rewarding: Corpse is a morbid but interesting element that leads to other combinations like zombie and ghost.
- How to make it:
1. Create Human (see above).
2. Combine Human + Time to create Corpse.

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7. Immortality
- Why it's rewarding: Immortality is a rare and mythical element that requires advanced combinations.
- How to make it:
1. Create Human (see above).
2. Combine Human + Fountain of Youth to create Immortality.
- To make Fountain of Youth:
1. Combine Water + Water to create Puddle.
2. Combine Puddle + Water to create Pond.
3. Combine Pond + Water to create Lake.
4. Combine Lake + Water to create Sea.
5. Combine Sea + Earth to create Primordial Soup.
6. Combine Primordial Soup + Life to create Fountain of Youth.

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Tips for Discovering Hidden Content:
- Experiment with everything: Try combining elements that seem unrelated. Sometimes, the most unexpected combinations yield rare results.
- Use hints sparingly: If you're stuck, use the in-game hint system to get ideas without spoiling too much.
- Think logically: Many combinations follow real-world logic (e.g., Human + Tool = House).
- Check the encyclopedia: The in-game encyclopedia tracks your progress and can help you identify missing elements.

By following these steps and tips, you can uncover some of the most rewarding hidden content in Little Alchemy 2!