> For the complete documentation index, see [llms.txt](https://shooter-2.gitbook.io/shooter/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://shooter-2.gitbook.io/shooter/upgrade.md).

# Upgrade

#### 🛠️ **Tank Upgrade System in Merge Shooter**

In **Merge Shooter**, there are **9 unique tank levels**! 🔥\
To upgrade a tank, simply **merge two tanks of the same level** — and watch them evolve into a more powerful version! ⚙️🚀

🔹 **Example**:\
Level 1 Tank + Level 1 Tank → Level 2 Tank\
Level 2 Tank + Level 2 Tank → Level 3 Tank\
... and so on, up to Level 9! 💣

🧠 **Strategy Tip**: The higher the tank level, the stronger your firepower and the easier it is to survive monster waves!

<figure><img src="https://794646525-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FFR6Tde4vzmiKaO8MQFTj%2Fuploads%2FMMCzbV4uAYej9kPOOs6w%2Fimage.png?alt=media&amp;token=5e66d151-fc28-44ff-a435-5df79d5a683f" alt="" width="258"><figcaption></figcaption></figure>