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CLUSTER GAME-COOPERATIVE-MULTIPLAYER · 7 ENTRIES · EARLIEST ENTRY 2026-09-09

Co-op multiplayer game mods

This cluster consists of unofficial mods that add cooperative multiplayer to single-player games, such as Morrowind and action titles, with synchronized gameplay, shared sessions, and chat. The cluster's dated history is too thin to read a shape from—only zero dated entries exist before the index start, suggesting it predates the index or its members are undated. Among the traction leaders, sandtogether has the highest activity with 8 stars, followed by HT2MP with 4 and CrimsonDesertMultiplayer with 3.

Entry timeline

ENTRY TIMELINE

AUG 2026: 1SEP 2026: 5OCT 2026: 1
AUG 2026OCT 2026

Each bar is the month a member carries, which is a creation date where the source published one and a crawl date otherwise. Nothing in the index was found before 11 August 2026, and coverage broadened sharply on 14–15 August, so a bar from then on reports how much we found that month, not how much was built; an earlier bar reports how far back a member's own source dated it — not how long we have been watching.

Members by activity

Activity signals, not revenue.

Build origin · 1 hand-coded · 6 unlabelled

Operator · 5 hobby · 1 open source · 1 unlabelled

Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 7 listed below. Unlabelled means nothing has decided yet — not that the answer is small.

  1. 01sandtogether8★1 mo—hand-codedhobbyAdds co-op multiplayer to a game with host-authoritative shared worlds over Steam P2P.
  2. 02HT2MP4★21 days—hobbyMultiplayer mod for Hard Truck 2 that lets players join a shared server, choose vehicles, and drive together across the same map.
  3. 03CrimsonDesertMultiplayer3★8 dayslivehobbyUnofficial game mod that adds two-player cooperative multiplayer to an action game.
  4. 04MWNet1★19 days—hobbyMultiplayer client and server that adds online cooperative play to Morrowind, with synchronized gameplay and custom server scripting for players.
  5. 05RadiantMP0★1 mo—hobbyCooperative multiplayer mod for a single-player game, adding synchronized player avatars, shared sessions, and in-game chat.
  6. 06Fable3-Coop0★29 days—open sourceCommunity mod that adds two-player online co-op to Fable III with friend invitations, session controls, and networking.
  7. 07PlanetSMP - The Earth SMP Experience0★unknownliveGame server that combines two game modes to create a survival multiplayer experience.

Ranked by traction, highest first, and paged 20 at a time — this is a window on the cluster, never the whole of it. Ties are broken by a stable id so a product cannot appear on two pages or fall between them. Browse every cluster.