The Advance Server in Garena Free Fire serves as a testing ground where you can get early access to upcoming updates. So there you have a better chance to experience new content, identify issues, and provide feedback to developers. Now that there are also some Free Fire OB51 advance server leaks, you can have a preview before the global rollout. So, what will this OB51 bring to the game? We are going to find out.

Also don’t forget to top up Free Fire gameplay with Enjoygm prior to the update. The safest and the fastest top up services are there to buy diamond packs. You can use the platform to upgrade your heroes in the best way with the cheapest price so don’t miss out on your chance.
Free Fire OB51 Advance Server Release Date and Registration Process
The OB51 Advance Server is expected to be activated in early October 2025. It will follow up with a registration process opening around the first week of that month. This date is aligning more towards the global OB51 update scheduled for October 29, 2025, which may have some Halloween-inspired elements. But it is just a speculation based on the timeline.

There are also some leaks suggesting that the server will be released in late September, but chances are high for it to be released in October based on the stability testing patterns.
You can currently register to the server with these steps :
- Head to the official Advance Server website
- Log in using your Free Fire-linked Facebook or Google account
- Complete the form with your full name, email, active Free Fire UID (in-game ID), and a brief explanation of why you want to join.
- Agree to the terms and submit. If approved, you’ll receive an activation code via email or your in-game mailbox within days.
- Download the OB51 APK and this might take approximately 626 MB from the site. Make sure you enable “Unknown Sources” installation on your Android device, and input the code to launch.
To become eligible for the Free Fire OB51 advance server, players have to be at least 18 years old with a Free Fire account active for nine months or more. Not everyone will get the access, and the access will be given by prioritizing the accurate details in your application to boost chances. The server isn’t available on iOS, emulators, or the Indian server (use a VPN set to Singapore if needed). Once active, the test period lasts 1-2 weeks, after which the server closes and progress resets without transferring to the main game.
Leaked Features and Changes in OB51
There are some Free Fire OB51 advance server leaks that suggest that it will bring several exciting updates, focusing on gameplay depth, visual improvements, and overall balance. Keep in mind that these features come from data mining and tester previews, so some details may change before the official release.
But still, here are the leaks released so far now regarding the gameplay changes:

- Match Dynamics and Player Count: Standard battle royale matches may expand from 50 to 100 players. This increases intensity and strategy while keeping Free Fire’s fast-paced gameplay.
- New Characters and Abilities: Leaked info hints at new characters with skills centered on mobility and support, like evasion boosts or team buffs. Existing heroes could see balance adjustments to fit the larger player lobbies, ensuring fair matches.
- Weapons and Balance Updates: We can expect new experimental weapons for close to mid-range fights. Some existing guns may be adjusted for balance, including recoil reductions on assault rifles and improved shotgun accuracy.
- Maps and Environment: Maps like Bermuda and Purgatory may expand with new landing spots and cover, designed to accommodate more players. Dynamic weather and destructible elements could appear, adding variety to strategies and rotations.
- Skins, Cosmetics, and UI: Fresh character and weapon skins are leaked, often tied to seasonal themes. The user interface is expected to get cleaner, with simplified menus for faster navigation. Pets and cosmetic bundles also enhance the visual experience.
- Game Modes and Events: OB51 may introduce experimental modes, including limited-time 100-player variants. Event collaborations, like Naruto Shippuden, could return, along with Halloween-themed challenges that offer exclusive rewards.
- Performance and Fixes: Stability improvements target crashes in high-player scenarios and optimize load times, helping the game run smoother on mid-range devices.
Tester Benefits and Rewards
By joining the Advance Server, you get first access to unreleased content and a head start post-launch. Regular testing can earn you free diamonds, exclusive skins, and bundles. Submitting bug reports through the in-game tool or support portal can also grant premium items. Remember, errors are part of the testing environment and are expected for reporting purposes.
There is also another chance to increase these reward amounts with Enjoygm. Use it as your live top up application process and buy diamond packs with the cheapest price from it. So you can have the most upgrades at the most affordable cost for Free Fire while enjoying this new update.

Conclusion
And those are all the current Free Fire OB51 advance server leaks we have right now. Remember, these aren’t confirmed so when there is an actual release, these updates can be changed. But still, you can use this guide to decide if the testing suits your play style or not so let’s wait and see what we are getting.