Top similar games like The Big Book of Monsters:

Land Drifters is an incremental RPG game that can be played idle or active. Explore islands, unlock new skills and combat classes, overcome obstacles, and more! The game is jam-packed with many paths of progression intertwined throughout the game!

Idle Dungeon Crawling x Incremental Clicker: Experience the thrill of limitless growth. Master hero synergies and upgrade priorities to bring strategic depth to every dungeon run

Collect resources, craft armaments then sell for some coins. Set in medieval fantasy world where you play the role as a merchant selling armaments for adventurers or warriors alike. As long as coin is involved, it's nothing more than a business.

Grow your realm, build alliances, and explore one of the deepest idle RPGs ever!

Recruit an ever-growing army of heroes, stack powerful upgrades, and watch the numbers go up as your forces chip away at a colossal dragon!

A fantasy idle RPG. Manage your camp, recruit heroes, and let auto-battles fight for you. Farm gear and materials from every fight, then strengthen, enchant, and customize affixes to forge your own powerful equipment as you conquer the frontier stage by stage!

A deep idle RPG with 26 skills, class-based progression, and wave-based dungeon combat. Train skills, craft gear, build your estate, and automate production. Progress keeps ticking even when you're offline.

An incremental RPG where you reincarnate through lifetimes, mastering professions, unlocking skills, and exploring mystical realms.

High Fantasy Idle is an idle RPG with unique class-based gameplay and hundreds of achievements and secrets to find. Level up by farming, battling, and researching while buying items and perks, then rebirth to find newfound power! Embark on a journey of fantasy and mystery to unravel your destiny.

A pirate idle RPG that runs as an overlay on your desktop. Sail between locations, fish, craft goods, brew, trade at the marketplace, and battle enemies while leveling up fishing, combat, and sailing skills in the background.

An idle incremental bullet heaven where you fight waves of enemies, collect loot, and grow stronger every run. Play four different classes, craft items, run a shop, tend a garden, raise pets and keep progressing even while you're away.

A World of Warcraft inspired game, with RPG features and an offline progression. Choose one of the 8 heroes and start farming, fighting, questing, trading and running Dungeons.

Wyverns have stolen the Kingdom's Light! Rebuild the Keep, grow stronger and gear up to defeat the Wyvern Queen and restore magic to the Kingdom.

Tap and idle your way through 40 areas with adorable catgirl and bunny girl companions! Level up your crew, trigger powerful skills, and prestige for Stardust in this cute pixel art idle RPG with a full original soundtrack.

An idle RPG for the corner of your screen. Follow Iris's long adventure, battle for equipment and resources, and grow Life Skills like Mining, Logging, Fishing, Cooking, Farming, Writing, Painting, and Commerce. Play or step away—Iris's day goes on.

Welcome to Magic Research 2, an incremental RPG from the creator of Magic Research. Learn countless spells, face powerful foes, and command a team of Wizards who can cast spells for you as you journey to find or create the Philosopher's Stone.

Build and manage a medieval graveyard while facing ethical dilemmas and making questionable decisions. Welcome to Graveyard Keeper, the most inaccurate medieval cemetery sim of the year.

Slay monsters and get through the campaign that includes alot of monsters, raids and other challenges. Upgrade yourself and your companions to beat those horrible monsters Compete against friends to ranking list and complete all achievements in the game.

An idle RPG: train 17 skills, master nine weapons, craft your own gear, unlock seven boss-guarded regions, and raise an Estate that works while you sleep — your progress keeps ticking even offline.

You wake up in an unknown land. Again. Use the experience from every past life and your ever-growing knowledge of alchemy to extend each life through a robust alchemical system. Explore, break through and uncover all the world has to offer in this minimalist RPG distilled down to its purest form

Dragon Cliff is a Semi-Idle RPG game with deep and complex itemization/skill systems to support endless character builds. Players are to collect adventurers, kill monsters, advance talent trees, enchant/reforge equipment, discover scrolls and finally assemble the most powerful adventure team!

Everyone’s favorite laid-back dungeon crawler returns in Soda Dungeon 2. Featuring a new adventure, a whole town to upgrade, crafting, new classes, alternate dimensions, and more! It’s everything you loved about the original plus all the stuff you’ve been asking for.

Shoot goblins, grow your army, and maintain your speed with every tap. Play in full screen or let the game run silently at the bottom of the screen while you do other things.

Gridle is an incremental idle RPG where you’ll manage a powerful party to take down waves of enemies! Strategically upgrade, heal, reassign, and level up your party members to conquer the world!

Idle Chest is a simple incremental game where you open many chests, normal chests, golden chests, magic chests and other mysterious chests. Open chests, improve your chests, complete quests and loot rare equipments.

Become the ultimate Guild Master in a pixel art world! Manage your guild, craft epic gear, uncover a vast bestiary, and recruiting a diverse team of adventurers and workers. Prepare your heroes for battle and unravel the mystery surrounding your missing king!

A fantasy incremental game where you mine resources, forge and sell weapons, hire skilled workers, unlock abilities, and automate your growing operation.

Conquer PickCrafter, the hit indie idle game! Break blocks, forge equipment, and collect powerful Pickaxes. Prestige to legendary tiers with the new Ascension Skill Tree. Discover biomes and battle epic bosses. Make meaningful choices and invent complex builds in this addictive endless adventure!

An idle ARPG inked on parchment. Tap to fight, drag loot out of 35 zones, summon weapons that swing on their own, and Ascend for permanent power. Deep builds, six rarities, a real crafting forge. No ads, no microtransactions, no timers — buy it once, play it offline.

Greenhaven Realms is a fantasy medieval Idle RPG where players embark on epic adventures. Engage in thrilling combats, craft powerful items, gather resources, mine for treasures, trade goods, and explore vast lands. Build your kingdom and shape your destiny in the enchanting world of Greenhaven.

This is a xiuzhen simulation placement game! From the refining of qi, building the foundation to the ascension of the celestial realm, crossed into the divine realm. （The game has been updated with the english mod, but you will need to select the "english" beta in the properties option to update it）

Kill monsters. Get loot. Get stronger. Then what? Kill BIGGER monsters. Get EVEN MORE loot. Upgrade. Upgrade again. Keep looting. Keep growing. How powerful will you be? Become the best monster looter in the world!

Become the most powerful wizard by playing with runes, learning spells, and mastering upgrades. Do you have what it takes to be the hero this world needs?

An Epic Incremental/Idle RPG

A massive RuneScape-inspired idle RPG built for long-term progression. Train 24 skills, defeat bosses, collect over 500 souls, and bank offline time to accelerate your progress whenever you choose.