Quick answer

There is no official multiplayer mod for IRON NEST. Community co-op mods exist on Nexus Mods, but they are unofficial, early-stage (version 0.1.0-level), unendorsed, and some carry virus-scan warnings on the platform itself. Using them is a risk decision, not a supported feature. Verified August 12, 2026.

What community mods exist

Community reports identify three co-op-oriented mods on Nexus Mods:

| Mod | Reported characteristics | | --- | --- | | "VR and Co-op" (#17) | Co-op-related content; unofficial | | "Iron Nest Co-op" (#20, by Jager2251) | Described by players as the most straightforward co-op setup | | "Open Nest Co-op" (#36, by Tong317) | v0.1.0, zero endorsements at time of research, carries a "suspicious files" virus-scan warning on Nexus Mods |

All three are community projects, not official. Details like exact features and install steps are 待确认 (unconfirmed) — the research recorded their existence and risk profile, not a full walkthrough.

The risks of these mods

  • No official support — the developers do not endorse, maintain, or troubleshoot them.
  • No security review — at least one mod flagged a virus-scan warning; endorsements were near zero, which is a weak trust signal.
  • Patch fragility — the game shipped three builds in its first week (1547, 1558, 1577); a mod built for one build can break on the next.
  • No netcode guarantee — the base game is single-player; community co-op runs on its own networking and can behave unpredictably.

Does a mod change the official answer on co-op?

No. The official answer remains: the game has no official co-op or multiplayer, and a separate co-op title is a later project with no confirmed date. A mod is a community workaround, not a product feature.

If you still want to try one

  • Download only from the mod's own Nexus Mods page; never from a repack or "quick download" mirror.
  • Read the virus-scan result before installing.
  • Make a backup of your saves first (the Build 1558 patch fixed a save-corruption bug, so save hygiene matters in this game).
  • Uninstall the mod before reporting any bug to the developers — official support channels cannot reproduce modded issues.

Sources and update note

  • Nexus Mods listings for mods #17, #20, #36 — existence, version, endorsements, and scan warnings (community platform, treated as community data).
  • Official Steam page — single-player category.

Mod data is community-sourced and labelled as such. Last checked August 12, 2026.