# Games like castle idler

> The closest matches to castle idler: Zero Stress King: Idle Defense, Goblin Buster: Incremental Tower Defense, Outhold, Loot Loop, and Particul. Ranked by imho.run from Steam co-play data, shared tags and reviews.

## Similar games, ranked

The full ranked list, 24 games, best match first (the HTML page shows the top 8 as cards).

1. [Zero Stress King: Idle Defense](https://imho.run/games/4271160/zero-stress-king-idle-defense) — Shares tower defense and auto battle with castle idler. 523 Steam reviews, 89% positive. [Steam](https://store.steampowered.com/app/4271160/)
2. [Goblin Buster: Incremental Tower Defense](https://imho.run/games/2482250/goblin-buster-incremental-tower-defense) — Shares tower synergy combos and tower defense with castle idler. 76 Steam reviews, 75% positive. [Steam](https://store.steampowered.com/app/2482250/)
3. [Outhold](https://imho.run/games/3767740/outhold) — Shares tower defense and build variety with castle idler. 749 Steam reviews, 86% positive. [Steam](https://store.steampowered.com/app/3767740/)
4. [Loot Loop](https://imho.run/games/3972320/loot-loop) — Shares idle progression and skill tree progression with castle idler. 265 Steam reviews, 90% positive. [Steam](https://store.steampowered.com/app/3972320/)
5. [Particul](https://imho.run/games/4273120/particul) — Shares idle progression and meta progression with castle idler. 413 Steam reviews, 80% positive. [Steam](https://store.steampowered.com/app/4273120/)
6. [Cult Nation](https://imho.run/games/3897540/cult-nation) — Shares grind based progression and idle progression with castle idler. 66 Steam reviews, 92% positive. [Steam](https://store.steampowered.com/app/3897540/)
7. [Idle Tower Defense](https://imho.run/games/3054090/idle-tower-defense) — Shares tower defense and idle progression with castle idler. 74 Steam reviews, 54% positive. [Steam](https://store.steampowered.com/app/3054090/)
8. [This Isn't Just Tower Defense](https://imho.run/games/3653600/this-isn-t-just-tower-defense) — Also Clicker and Tower Defense, like castle idler. 79 Steam reviews, 65% positive. [Steam](https://store.steampowered.com/app/3653600/)
9. [Incredicer](https://imho.run/games/3929760/incredicer) — Also Clicker and Idler, like castle idler. 1,676 Steam reviews, 85% positive. [Steam](https://store.steampowered.com/app/3929760/)
10. [Refence](https://imho.run/games/3427090/refence) — A frequent pick in castle idler players' libraries, and another Strategy. 73 Steam reviews, 75% positive. [Steam](https://store.steampowered.com/app/3427090/)
11. [Duncrush](https://imho.run/games/2374670/duncrush) — Shares auto battle and skill tree progression with castle idler. 129 Steam reviews, 87% positive. [Steam](https://store.steampowered.com/app/2374670/)
12. [Hydra Heli](https://imho.run/games/3858850/hydra-heli) — Shares grind based progression and auto battle with castle idler. 54 Steam reviews, 93% positive. [Steam](https://store.steampowered.com/app/3858850/)
13. [Desktop Defender](https://imho.run/games/3772810/desktop-defender) — A frequent pick in castle idler players' libraries, and another Indie. 1,224 Steam reviews, 94% positive. [Steam](https://store.steampowered.com/app/3772810/)
14. [Click and Conquer](https://imho.run/games/3267900/click-and-conquer) — Shares idle progression and meta progression with castle idler. 1,338 Steam reviews, 93% positive. [Steam](https://store.steampowered.com/app/3267900/)
15. [All Aboard! The Train Defense Express](https://imho.run/games/3359200/all-aboard-the-train-defense-express) — Shares tower defense and auto battle with castle idler. 145 Steam reviews, 81% positive. [Steam](https://store.steampowered.com/app/3359200/)
16. [Simultree](https://imho.run/games/3811840/simultree) — Shares idle progression and upgrade system with castle idler. 73 Steam reviews, 88% positive. [Steam](https://store.steampowered.com/app/3811840/)
17. [Fill Up The Hole](https://imho.run/games/3343160/fill-up-the-hole) — Shares idle progression and achievement hunting with castle idler. 843 Steam reviews, 90% positive. [Steam](https://store.steampowered.com/app/3343160/)
18. [Snakecremental](https://imho.run/games/3570430/snakecremental) — Shares idle progression and skill tree progression with castle idler. 307 Steam reviews, 80% positive. [Steam](https://store.steampowered.com/app/3570430/)
19. [Ash Warden](https://imho.run/games/3913310/ash-warden) — Shares tower placement and tower defense with castle idler. 70 Steam reviews, 71% positive. [Steam](https://store.steampowered.com/app/3913310/)
20. [Tower Wizard](https://imho.run/games/3372980/tower-wizard) — Shares idle progression and build variety with castle idler. 6,473 Steam reviews, 97% positive. [Steam](https://store.steampowered.com/app/3372980/)
21. [Row Divers](https://imho.run/games/2572300/row-divers) — Shares auto battle and idle progression with castle idler. 127 Steam reviews, 89% positive. [Steam](https://store.steampowered.com/app/2572300/)
22. [Crusaders Quest : Hero Town](https://imho.run/games/4126220/crusaders-quest-hero-town) — A frequent pick in castle idler players' libraries, and another RPG. 215 Steam reviews, 86% positive. [Steam](https://store.steampowered.com/app/4126220/)
23. [DEFRAG](https://imho.run/games/4028640/defrag) — Shares skill tree progression and achievement hunting with castle idler. 177 Steam reviews, 95% positive. [Steam](https://store.steampowered.com/app/4028640/)
24. [Feed the Reactor](https://imho.run/games/4009730/feed-the-reactor) — Shares idle progression and meta progression with castle idler. 424 Steam reviews, 81% positive. [Steam](https://store.steampowered.com/app/4009730/)

## Machine-readable

The same ranked list as JSON from the imho.run API for AI assistants (GET, no key, same site as this page):

- Top 20: https://imho.run/api/agent/games-like?q=4082900&n=20
- Co-op games only: https://imho.run/api/agent/games-like?q=4082900&n=20&coop=true
- Free games only: https://imho.run/api/agent/games-like?q=4082900&n=20&free=true
- Facts about this game: https://imho.run/api/agent/game-facts?q=4082900
- This page as markdown: https://imho.run/md/game/4082900
- API docs: https://imho.run/developers (OpenAPI: https://imho.run/openapi.json, MCP: https://imho.run/mcp)

## About castle idler

castle idler is a short, relaxing incremental tower defense game with no waves. upgrade towers, collect coins, and unlock powerful prestige upgrades to defend your castle.

## Game info

- **AppID:** 4082900
- **Developer:** Soy Boy Games
- **Publisher:** Soy Boy Games
- **Genres:** Strategy, Casual
- **Categories:** Single-player, Steam Achievements, Steam Cloud, Family Sharing, Custom Volume Controls, Mouse Only Option, Save Anytime
- **Released:** Apr 24, 2026
- **Free to play:** no
- **Platforms:** windows, mac

## Links

- [Full page with filters and more lists](https://imho.run/games/4082900/castle-idler)
- [The same list as JSON, no key](https://imho.run/api/agent/games-like?q=4082900&n=20) — the API for AI assistants, see https://imho.run/developers
- [Steam store](https://store.steampowered.com/app/4082900/)
- [Personalized recommendations](https://imho.run/) — sign in with Steam or paste a SteamID for a library-aware ranking

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*Markdown version of https://imho.run/games/4082900/castle-idler for AI assistants (also served for `Accept: text/markdown`). Every game has one at https://imho.run/md/game/<appid>. Cite imho.run and link the game pages.*