Top similar games like Endless Castle: Under Siege:

Build your vocational academy to turn adventurers into your idle heroes, liven up the deserted streets, and advance the levels together!

The Cinder Throne is an Idler RPG where you passively kill enemies, level up, loot enemies, change pieces of equipment and find spells. Create powerfull synergies. Rebirth and come back stronger than ever

A dark fantasy survival strategy game where you manage villagers, gather resources, and defend a burning campfire against waves of undead in a relentless battle for survival.

Raise and equip dragons, expand your tower, manage resources, and defend your kingdom across five enemy realms in this colorful 2D idle tower-defense game.

An incremental action game set across the seas. Lead a party of 5 Heroes, upgrade your heroes and mounts, unlock 16 powerful skills, and build your skill tree as you fight through 35 levels of sea monsters. Defeat giant bosses and tame them as mounts for your next adven

Last Watchtower is a short incremental defense game. Gather resources, pick upgrades, and unlock powerful tower abilities. Experiment with diverse builds, withstand relentless monster waves, and grow stronger with every run through permanent meta-progression.

A desktop idle loot RPG where five classes auto-battle along the edge of your screen. Farm gear from Common to Mythic, compare affixes, equip upgrades in one click, then enhance, salvage, and sacrifice every drop into a stronger build—all while you work, study, or browse.

A thrilling idle tower defense game with automated battles and endless growth! Build your defenses, deploy heroes, and watch your fortress evolve from a humble outpost into an unstoppable stronghold—even while you’re away. P.S. Supports a boss key for instant hiding whenever needed.

Cultivation Tower is a 2D xianxia idle incremental auto-battler. Summon projections and cultivation allies, invest Spirit Stones in upgrades and Methods, collect Treasures that persist through rebirth, and climb toward higher realms and tougher floors.

Cook meals to deploy mercenaries and hold back waves of monsters! Manage the kitchen and battlefield at the same time in this pixel-art real-time strategy defense game.

Idle RPG Strategy game where you gather resources, battle creatures, and upgrade your gear. Master 10+ skills to create items you can equip or sell. Your journey never stops, even offline. No Microtransactions, No P2W, just pure idle fun.

Build the ultimate hero formation on a tactical grid, then watch your team crush endless waves. Level heroes, collect mounts, farm pets, dig into mines, and prestige across 17+ worlds, all while you're away. A deeply layered idle RPG with real strategic depth.

Forge insanely rare turrets in an incremental idle tower defense. Hunt impossible loot, unlock powerful relics, expand your skill tree, complete quests, and discover game-breaking synergies as you chase the rarest drops imaginable.

A light city-building game that combines elements of card games and tower defense, where players must survive daily enemy attacks and gradually grow their strength to ultimately defeat powerful invaders.

Craft a party of RPG heroes and send them adventuring for levels and loot. Play actively to speed their progress, or leave them to grind on their own. Battle through beautiful and deadly biomes, advancing abilities and gear, then reset your progress to unlock powerful new mechanics and meta bonuses!

Desktopia is a city-builder game which simulates an evolving, medieval-esque village along the bottom of your desktop, allowing you to work, watch, or browse something else while you play.

Chippy Beaver​ is an engaging incremental idle game where you lead your beaver colony to chop down fantastical trees in the sky, harvest various relics, construct diverse buildings, and use money to upgrade your beavers.

Noble Rulers — grow your realm and expand your castle in this short incremental game! Manage resources, discover foreign lands and build up an army to lay siege to your enemies.

The Infinite Realm: Idle is a cultivation-themed idle RPG. auto-battle, and grow through endless reincarnations with permanent % stat boosts. Collect hundreds of gear pieces, forge your build, and raise spirit pets. Challenge core realms for Dao Source. Idle cultivation, freely attain the Tao.

Crack open chests, chain buffs and recruit the ultimate goblin crew in this fast-paced incremental auto-battler. Send them deeper into dungeons. Get better loot. Repeat!

Plant towers, hold the Nexus. A pixel-art tower defense where population caps how wide you can build, gold and mana decide what you build with. Draft augments as you level, spend gems on a permanent power-up tree, and find out how long your walls hold.

A deep idle strategy game with extensive progression: heroes, promotions, arcane arts, gear, spirit beasts, talents, and runes. Create thousands of unique builds to form powerful teams! Experience adventure, team battles, and Demon Tide defense, and win easily with smart strategies!

A Tower Defense with deck of cards. Unlock cards and build your own deck to beat the levels. Easy to play but hard to master.

An endless Tower Defense game of epic Monsters vs evil War Machines. Unlock and upgrade tons of unique elemental Monsters (Water, Air, Earth, and Fire) to defend your home from an infinite swarm of robots. Strategize the most effective placement of Monsters to synergize their elemental abilities.

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!

This game is a fresh take on tower defense strategy, where it's not just about stacking numbers but engaging in a dynamic play of colors. Change the colors of your towers, enemies, terrain, and magical artifacts to create various offensive and defensive effects through color matching. "Magicolor"

Explore your guild hideout as the Guild Master, prepare your heroes, send them into automated combat expeditions, then use whatever they bring back to improve the guild.

Recruit, manage, and send your hireling crew to conquer demons and gather treasure—all from the corner of your screen. "Loot of Baal" is an idle desktop game where adventure runs alongside your daily tasks. Can your heroes save the world from chaos?

Delve into the mystical art of summoning alongside Feylin, the last of the Ancients. Begin your journey as her new apprentice and learn how to summon minions, outwit your enemies, collect relics to enhance your powers and overcome the dreadful obstacles set in your path.

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

An idle RPG with the build depth of an MMO. Pick one of four classes, climb a talent tree into one of twelve specializations, and write the spell rotation your hero fights with. Then dig into crafting, elements, Mythic+ dungeons and an endless Abyss. It runs while you're away.

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.