Onet: Monster Book

Welcome to "Onet: Monster Book." Here, your adventure starts as you search, connect, and win. Inside this magical book, you'll find hundreds of silly monsters with all kinds of funny faces. Some stick out their tongues, some open their eyes wide, and others make faces that will make you laugh. These monsters are trapped between the pages, and only you can help them find their twins and escape. As you turn each page, you'll meet more monsters, see bright effects, and face new surprises. Every level is a fresh page of fun, full of color and excitement. Stay sharp, use your memory, and act fast. If you do, you'll become the champion of this wild book. Get ready to play and show the monsters who connect best.

How to play?

Let's see how the game works and what you need to do. On your screen, you'll see lots of cards with monster faces. Your job is to find matching pairs and connect them with a line. There's a catch: nothing can be between the two cards you connect. If you make a match, the pair disappears, you earn points, and you move forward. The goal is to clear all the cards and complete the level as quickly as possible. Each new level brings more monsters and a trickier field. If you get stuck, you can use magic hints to shuffle the cards, reveal a matching pair, or add more time. Play smart, make combos, and collect rewards. Every level you finish brings you closer to solving the whole monster book. Good luck! Stay quick and pay attention.

Get ready to play now the online game Onet: Monster Book for free and without registration.
Category: Merge Games
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About this game:

  • Players have rated this game out of 5, based on votes.
  • Released in October 2025.
  • Ready to play on Web Browser (PC) and Android/iOS (Mobile).
  • Powered by HTML5 — jump right in and start playing in your browser, no downloads needed.

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