Bestiary Arena: what it is, rules and how to leave it running on your PC

What is Bestiary Arena

Retro browser idle autobattler inspired by Tibia: the player collects creatures, upgrades their stats and equipment and sends them to fight in regions of the map. It has seasons with rankings in three categories and exclusive rewards, login with a Discord account and a shop with Beast Coins. The site publishes no rules on multiple accounts, automation or offline progress.

• It is free and runs in the browser on PC and phone, according to the home page.
• Login is done with a Discord account.
• Each major update opens a new season, with rankings in three categories (Rank points, Time and Floors) and badges from Silver to Challenger.
• Season 2 brought Awakening, a final tier for creatures, and the Ankrahmun and Edron regions.
• Battles use stamina, which recovers 1 point per minute; stamina potions restore it instantly.
• In the Daycare, creatures left there gain XP little by little.
• The shop sells Beast Coin packs paid via Stripe or Pix; the lifetime Premium Pass unlocks Autoplay mode and doubles daily rewards and Daycare XP.
• The footer credits the developer as @xandjiji; the menu links to a wiki at bestiaryarena.wiki.gg and to the Discord server.

What the community says on TopIdle

Bestiary Arena hasn't received votes on TopIdle in September 2026 yet. TopIdle marks the game as verified.

The community rating is 2.1 out of 5, with 5 reviews: gameplay 2.6, polish 2.6, and real-money trading (RMT) 1.0.

The full reviews, with comments from players, are on the Bestiary Arena page on TopIdle. IdleDeck has no connection to TopIdle or to the game: the numbers come from there and don't change what the game's rules say.

Community votes and ratings on TopIdle, updated Sep 25, 2026 at 11:54 AM BRT. The vote count restarts on the 1st of every month.

Do you need to keep the tab open?

The Bestiary Arena site doesn't say whether the account progresses with the tab closed (checked Sep 22, 2026).

The site does not say whether the game progresses with the tab closed. There is Autoplay mode (from the Premium Pass), which repeats battles automatically, and the Daycare, where creatures gain XP little by little.

You can find out in an hour: note your XP or loot, close the tab, come back later and compare. If nothing changed, the game needs the page open — and a regular browser slows down or even discards background tabs (see why idle games stop in the background).

Rules: multiple accounts, automation and VPN

The Bestiary Arena site doesn't publish rules on multiple accounts, automation, VPN or real-money trading (checked Sep 22, 2026). Before opening a second account, ask on the game's Discord.

• Multiple accounts: the site doesn't say. There are no published rules on multiple accounts.
• Automation (bots, macros, scripts): the site doesn't say. There are no published rules on bots or macros; the game itself offers Autoplay mode to Premium Pass holders.
• VPN and proxy: the site doesn't say. There are no published rules on VPN or proxy.
• Selling items for real money (RMT): the site doesn't say. The site publishes no terms or rules and says nothing about selling items or accounts for real money.

How to leave Bestiary Arena running in IdleDeck

1. Download IdleDeck (free, Windows 10 and 11) and link the app to your IdleDeck account — it takes a minute.
2. Click Add account, go to Other game or site and paste bestiaryarena.com/game.
3. Sign in to your Bestiary Arena account in that window, just like in the browser. Each IdleDeck account has its own login, cookies and cache — repeat step 2 for each account the game's rules allow.
4. Turn on alerts: Windows notification, sound or a Discord webhook to know on your phone when the account drops.
5. You can minimize. The page stays awake with the window minimized or in the tray. If it drops, IdleDeck retries on its own; if the game's connection drops, it alerts you — and reloads on its own if you turn that option on in the settings.