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Castle Constructor
Build and defend using a modular system of castle blocks. Fend off enemies who will climb over and break through your defenses. Collect new blocks and research techs to improve their strengths. From lowly soldiers to powerful siege weapons; defeat them all as you strive to protect your kingdom.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-26.
“peasants try invade my ponyfarm? i kill peasant with huge sharpened cuttlery peasant bring friend? problm”
— a player, Steam review · 9 hrs played“dev gave up”
— a player, Steam review · 5 hrs playedAchievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
1.2.6 Patch
A small patch just to fix a couple reported issues. As usual let me know if you encounter any issues with the update. Seaside level had an extra center tile. This resulted in spawner blocks being unab
1.2.5 Patch
Another small patch. Updated Unity editor and the pathfinding package to solve a few issues. The in-game bug reporter has been depreciated. Please send further bug reports via email (SisypheanGameStud
1.2.4 Patch
A small patch to fix the unity security issue that was recently found as well as update to the latest version of unity and the pathfinding system. If you encounter any bugs or issues please report the
1.2.3 Patch
A small patch to fix an issue with the tech tree panel where the trees did not scale properly for certain screen sizes and could end up off screen.
1.2.2 Patch
Just a small fix for a reported issue. The number of stone walls bought in endless was not being reset on starting a new level. Due to this purchasing a stone wall or buying the sawyer tech could caus
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-09-26.
| Genres | Strategy |
| Player tags | Tower Defense · Medieval · Strategy · PvE · Hex Grid · 3D · Building · Deckbuilding · Minimalist · Singleplayer · Early Access · Casual (SteamSpy community voting) |
| Features | Single-player · Family Sharing |
| Languages | English |
| Achievements | 9 |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS: Windows 10 Processor: 2.5 Ghz 2 core processor or better Memory: 4 GB RAM Graphics: Recent integrated graphics card or better DirectX: Version 11 Storage: 200 MB available space Sound Card: DirectX compatible