For the Season 6 version you just need to download the MAIN BRANCH of the game. No betas necessary this is all on official servers.

Available here: https://lastoasis.gg/faq
[last updated on 2020.04.08]

Unique thread for all server status updates.We recommend you follow our dedicated Twitter account for first-hand updates from our support team https://twitter.com/lastoasishelp

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