Dedicated Server Guide

Dedicated Server Guide

Retribution generates a fresh .miz for each turn, and that mission runs like any other DCS mission — including on a DCS dedicated server. This is how a squadron flies a Retribution campaign co-op: one person runs Retribution and generates the turn, the mission goes on the server, everyone flies it, and the results come back into the campaign. This page covers the workflow and the multiplayer settings that matter.

The big picture

Retribution stays a desktop app. You do not run Retribution on the server. The loop is:

1. On a normal client install, plan the turn in Retribution and press Take off to generate the next-turn mission (retribution_nextturn.miz).
2. Put that .miz on the dedicated server and run it.
3. The squadron joins the server and flies it. As the mission runs, in-mission events (kills, captures, runway damage) are written to a results file.
4. Pull the results back to the Retribution machine and submit them, advancing the campaign. Generate the next turn and repeat.

Server setup

Run DCS headless with a batch file launching DCS.exe --server --norender. The DCS WebGUI server manager (its index.html) handles administration — uploading the mission, starting/stopping, and managing slots.

A dedicated server is worth using even for a small group or solo play: it offloads the simulation and improves frame rates. One quirk to expect is that AI wingmen can behave oddly during taxi when the mission runs server-side.

Server configuration (scripting access)

Retribution missions rely on injected Lua plugins (see Lua Plugins), and some need access DCS sandboxes by default. On the server you must edit MissionScripting.lua to comment out the sanitization lines that remove the os, io, and lfs packages.

• This has to be redone after every DCS update — patches restore the defaults.
• If you run slmod, apply the same change to its parallel MissionScripting file.

Mission preparation

Generate the mission on a regular Retribution client, not the server. Pressing Take off produces retribution_nextturn.miz, which is ready to fly — it does not need to be opened or re-saved in the Mission Editor first. Copy that file straight to the server.

Results management

While the mission runs, events update a state/results file (Retribution writes campaign state to state.json). After the flight:

• Confirm the results file's timestamp updated (proof the mission wrote its outcome).
• Submit the results in Retribution to advance the campaign. If automatic pickup misses, submit them manually through Retribution's interface.

Keep the campaign save and the results file together, and back up saves between turns — a save migrated by a newer build is not readable by an older one.

Multiplayer and co-op notes for squadrons

• "Never delay player flights." For squadron play, enable the never delay player flights option so human flights aren't held on the ramp waiting for an AI scheduling slot — players spawn ready to go.
• Player tasks are built for groups. SCAR, Combat SAR, JAMMING, and TARPS are designed to be flown by humans; plan packages so the slots your pilots want are present in the generated mission.

See also

• Lua Plugins — what runs inside the generated mission
• Custom Campaigns — generating the missions you fly
• Getting Started — installing and running Retribution
• Mission planning — building the packages your squadron flies