How do you get free gold on door slammers game?

To get free gold in the Door Slammers game, you can complete daily challenges and events, which often reward you with in-game currency. Additionally, watching advertisements or participating in promotions may offer gold as a reward. Joining the game's community on social media or forums can also provide tips and occasional giveaways. Lastly, keep an eye out for updates, as developers sometimes provide free gold during special events or game launches.