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.

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 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!

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.

Desktop idle loot-grinder RPG, now with online co-op. Auto-battle rains down gear from Common to Mythic. Idle with up to 8 friends, chat while you farm, and roll the dice for the rarest drops. Leave it running, glance back — your squad has ascended into gods.

Conjure towers and cast spells to slay hordes of enemies attempting to destroy your lone bastion

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.

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!

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.

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!

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.

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"

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.

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?

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

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.

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.

This is a light Roguelike Auto chess game that combines Diablo Brush Equipment Elements . Hire mercenaries from four professions to battle the battlefield and fight monsters. By flashing equipment, refining entries, and matching relics, build a strong mercenary team to be invincible !

Invader TD is a side scroller tower defense, where the player is in the role of an alien race with the purpose of infecting and dominating the earth, you must protect yourself from the attacks of the humans, who are trying to destroy you.

A desktop idle RPG that lives on the side of your screen. Gather cute pixel heroes, rebuild a tiny town, and watch it grow while you work. Welcome to 《Crusader Quest: Hero Town》!

Protect the peaceful sleep of Your Meowness in this infinite incremental tower defense. Place fierce warriors, build your own path, unlock a ton of new skills and infinitely upgrade EVERYTHING.

A Lovecraftian idle RPG with auto-battles, loot farming, chests, team strategy, town building, gear crafting, Runewords, stages, towers, realms, and seasons. Serve the Old Gods, build your town, corrupt the chosen, and fight for their awakening!

A pixel idle tower defense where your kingdom fights on its own. Workers gather, your army auto-battles endless waves, spells self-cast — you aim the bow, chain combos and choose what to upgrade. Bosses, titans, prestige, 100+ achievements. The night is endless. The bow is yours.