How do you get free gold in shadowgun deadzone?

In Shadowgun Deadzone, you can earn free gold by completing daily missions and challenges, participating in special events, and leveling up your account. Additionally, some promotional offers or in-game rewards may provide gold as well. Keep an eye on updates and community events, as they often include opportunities to earn free resources. Lastly, watch for any potential giveaways from the developers or on social media platforms.