arcreactorlocator
by SG327
Arc Reactor Locator is a Fabric utility mod that gives players a locator item for finding Arc Reactor structures in the Overworld.
What it does
Holding the locator item and right-clicking it searches for the nearest valid Arc Reactor structure, and the mod then shows a direction arrow on the HUD with the distance, updated in real time while the item is held. No commands are needed to run a search. The mod is designed as a lightweight companion to the Avengers mod, and it requires that mod to be installed.
Once a player mines the important block of a located structure, that structure is marked as completed and is skipped by later searches, which keeps progression fair. Completion is tracked globally, so completed locations stay completed for every player on a world or server. The locator works in both singleplayer and multiplayer. The mod is published for Fabric 1.21.11 only, under the MIT License, and it is not open source. It runs on the client and the server, so both need it.
Key features
Locator item
A compass-like item searches the Overworld for the nearest Arc Reactor Core Room structure on right-click.
Direction arrow HUD
A simple on-screen arrow points toward the located structure and shows the remaining distance.
Completed structure tracking
Structures are marked completed once their core ore is mined, so the search moves on to undiscovered ones.
Shared progress
Completed locations are remembered across the whole world, so every player sees the same progress.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Finding the Arc Reactor
Players in an Avengers-themed world use the locator to reach a Core Room without searching by hand.
Shared multiplayer progress
On a server, one player's completed structure stays completed for everyone else.
Who it’s for: Players who run the Avengers mod and want a way to locate its Arc Reactor structures, in singleplayer or on a multiplayer server.
How it compares
Clokkworkk's Locator Maps is a Fabric mod for 1.21.1 with client and server environment under the MIT License, and it is open source. Tripp's Simple Compass is a client-side only Fabric mod for 1.21.1 – 1.21.4 under the MIT License, and it is also open source. Arc Reactor Locator targets only Fabric 1.21.11, does not require a shared install on the client alone, and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| arcreactorlocator | Fabric | 1.21.11 | Client and server | 2026-04-03 |
| Clokkworkk's Locator Maps | Fabric | 1.21.1 | Client and server | 2026-08-20 |
| Tripp's Simple Compass | Fabric | 1.21.1 – 1.21.4 | Client-side only | 2025-03-15 |
Questions
Does Arc Reactor Locator need the Avengers mod?
Does the server need Arc Reactor Locator?
Which game version does Arc Reactor Locator support?
In the catalog
arcreactorlocator is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 19,862 mods support Minecraft 1.21.11.
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What the author says
Description Arc Reactor Locator is a lightweight companion mod for Fabric 1.21.11 designed to work with the Avengers mod. It adds a locator item that helps players find the Arc Reactor Core Room structure in the Overworld without using commands. After locating a valid structure, the mod shows a simple on-screen…
Official listing
- Modrinth page
- modrinth.com/mod/arcreactorlocator
- Owner
- SG327
- Published
- 2026-04-03
- Updated on Modrinth
- 2026-04-03
- Facts verified
- 2026-10-15