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Idle Castellan
Climb from rookie knight to legend across four difficulties and an endless Nightmare mode. Build your own path through a massive skill tree, dispatch expeditions while you play, hunt gear up to infinite Godly rarity, and craft the exact bonuses you want. The climbing never really stops.

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Features
Single-player
Steam Achievements
Steam Cloud
Family Sharing
Steam is learning about this game 
Languages:
Interface Full Audio Subtitles
English ✔ ✔
This game is not yet available on Steam

Planned Release Date: Aug 21, 2026

This game plans to unlock in approximately 13 days

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About This Game

Idle Castellan — Climb from a rookie knight to a legend with real choices behind every stat. Deep systems, infinite scaling, and a difficulty ceiling that doesn't actually exist.

  • Expedition — Send your knight on background missions; risk failure for bigger rewards.

  • Skill Tree — A branching tree of builds; every choice opens new paths forward.

  • Loot & Rarity — Gear scales past Legendary into infinite Godly tiers in Nightmare mode.

  • Crafting — Use rare shards to guarantee exact stats instead of rerolling blindly.

  • Nightmare Mode — The endless endgame difficulty, unlocked after clearing every map.

  • Pets — Recruit a companion for a passive edge in every fight.

Planned Upgrades — What's coming next:

  • Leaderboard — Compete globally by stage and difficulty reached.

  • More Gear — New sets, rarities, and item types on the way.

  • More Pets — Additional companions to recruit and collect.

  • New Bosses — Fresh encounters to challenge along your climb.

  • Ongoing Balance — Regular tuning based on player feedback.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Some assets are AI generated

Used AI to troubleshoot code and to translate.

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 64-bit
    • Processor: Dual-core 2.0 GHz or better
    • Memory: 4 GB RAM
    • Graphics: Any integrated graphics (Intel HD 4000 or equivalent) — the game is 2D sprite/DOM rendering, no dedicated GPU needed
    • Storage: 500 MB available space
    • Sound Card: Integrated/onboard is fine
    Recommended:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10/11 64-bit
    • Processor: Dual-core 2.5 GHz or better
    • Memory: 8 GB RAM
    • Graphics: Any integrated graphics
    • Storage: 1 GB available space
    • Sound Card: Integrated/onboard is fine
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