Are there any secret achievements in Little Alchemy 2?

In Little Alchemy 2, there are no secret achievements in the traditional sense. The game does not have a built-in achievement system like some other games. Instead, the primary focus is on discovering all the possible elements and combinations. Your progress is tracked through the encyclopedia, which shows all the elements you've discovered and hints at those you haven't.

To maximize your progress and ensure you've found every possible element, follow these steps:

1. Check Your Encyclopedia: Open the encyclopedia (book icon) to see which elements you've discovered and which ones are still missing. Missing elements will appear as question marks.

2. Experiment with Combinations: Combine elements in creative ways. Sometimes, unexpected combinations can lead to new discoveries. For example:
- Earth + Fire = Lava
- Water + Earth = Mud
- Air + Fire = Energy

3. Use Hints Wisely: If you're stuck, the game offers hints. Use them sparingly to guide you toward missing elements.

4. Explore All Categories: Elements are grouped into categories like Basic Elements, Life, Technology, and more. Make sure to explore combinations within and across these categories.

5. Look for Hidden Elements: Some elements are harder to find because they require multiple steps. For example:
- Human + Tool = Engineer
- Time + Life = Death
- Plant + Time = Tree

6. Complete the Game: The ultimate goal is to discover all 720 elements (as of the latest version). Once you've found them all, you'll have effectively "completed" the game.

While there are no secret achievements, the satisfaction of discovering every element and filling your encyclopedia is the main reward in Little Alchemy 2. Keep experimenting, and enjoy the process of uncovering all the hidden combinations!