CS - Complementary Structures
With CS - Complementary Structures, new ruins, castles and towers generate across the overworld, from desert pyramids to ocean spires and Nether houses.
What it does
CS - Complementary Structures adds a set of small structures to world generation, with 57 structures listed by the author. Themed sites include an illager castle guarding three diamond blocks, a tower where a librarian keeps an enchanting table, a pyramid maze that leads to a golden tomb, underground dungeons with spawners, and an abandoned house in Mangrove Swamps. Some structures hold chests, and others hold prisoner villagers or iron golems kept in watch towers.
The mod requires CC - Complementary Core and Fabric API. Files exist for Fabric, Forge and NeoForge across the 1.18.2 – 26.1 range, and the mod is released under the MIT License. It is not open source. A server running it needs every connecting player to have it too. Snapshot builds are not part of the published files.
Key features
Illager castle
A castle where illagers defend three diamond blocks, with an illusioner in the upper part of the structure.
Desert and badlands ruins
A desert pyramid maze leading to a tomb with golden blocks, plus a small dungeon in the badlands.
Ocean and underground sites
A tower in the middle of oceans guarded by drowned and guardians, and a stray dungeon with a spawner in snowy biomes.
Nether and swamp houses
An abandoned house in Mangrove Swamps with many cobwebs and an ender chest, and a house in the Warped Forest of the Nether.
Village outposts
A strategic pillager point that illagers use to attack villages, with ravagers and tents inside a surrounding wall.
Compatibility
Latest build for each game version and loader.
26.x1 of 1 version with builds
1.21.x10 of 10 versions with builds
1.20.x2 of 2 versions with builds
1.19.x5 of 5 versions with builds
1.18.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
How it compares
Too Many Trials is server required with client optional, under the Apache License 2.0, and covers 1.21 – 26.2 on Fabric, Forge, NeoForge and Quilt. The Lost Castle is server-side only, open source under the GNU Lesser General Public License v3.0 only, and covers 1.18.2 – 26.1.2. Desert Pillager Wall is client and server, released under All rights reserved, for 1.16.5 – 1.21.8.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| CS - Complementary Structures | Fabric, Forge and NeoForge | 1.18.2 – 26.1 | Client and server | 2026-03-29 |
| Too Many Trials | Fabric, Forge, NeoForge and Quilt | 1.21 – 26.2 | Server required, client optional | 2026-08-10 |
| The Lost Castle | Fabric, Forge and NeoForge | 1.18.2 – 26.1.2 | Server-side only | 2026-05-10 |
| Desert Pillager Wall | Fabric, Forge and NeoForge | 1.16.5 – 1.21.8 | Client and server | 2025-09-29 |
Questions
Does CS - Complementary Structures need CC - Complementary Core?
Does the server need the mod?
Which loaders are the files published for?
In the catalog
CS - Complementary Structures is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 11,959 mods support Minecraft 26.1.
More from ElAguilaMC623
Similar mods
What the author says
Complementary Structures is a mod that adds some small and big structures in your world. The mod has for now 57 structures, but there are constantly new updates that adds more structures.
Official listing
- Modrinth page
- modrinth.com/mod/complementary-structures
- Owner
- ElAguilaMC623
- Published
- 2025-07-28
- Updated on Modrinth
- 2026-03-29
- Facts verified
- 2026-10-15