Development status
SE2MP status
Plugin 0.7.6Updated 8 Oct 2026
Working (tested in game)
Joining and connection
- Host and join over Steam: direct connection, no port forwarding (same-country player over the internet ~4 ms, overseas player ~145 ms)
- SE2MP Launcher: Host tab (rules, world, SteamID with Copy button) and Join tab
- Join by SteamID
- "Any Steam friend who is hosting" (fixed in 0.7.5)
- Two joiners at once (3 players in total over the internet)
- Mismatched plugin versions are refused
Playing
- Own character: walking, jetpack, animations visible to everyone
- Instant mouse turning for joiners (look prediction)
- Doors, hotbar, placing blocks, grinding your own blocks, building your own grids
- Flying ships
- The host's ESC menu no longer freezes joiners
- Leaving releases your character; rejoining (after a restart) gives back the same character, hotbar and suit colour
- Save and reload with joiners: their grids, identity, hotbar and saved character come back
Players
- Each player is their own player, with their own ownership and PCU
- Host settings: Team / Strict grid rules, Shared / Own research
- Suit colours visible to everyone
- Name tags with distance
Screens (joiners)
- Character inventory and cargo containers (moving items)
- Control panel: block list, toggles, sliders, renaming, both ways
- Production queues
- Cockpit HUD (fuel and power)
- Live PCU readout
Built, needs testing (0.7.5 / 0.7.6)
- On-screen join progress ("receiving 3 of 20 MiB", "building part 2 of 6", slow hard disk note)
- Rejoin without restarting: F3 at the main menu, plus automatic rejoin after a dropped connection
- Free camera race fix (a joiner on a slow PC ending up in free camera)
- F6 only selects your own character and gets you out of the free camera
- Crash fixes:
- joiner crash when getting up from a seat with a tool
- host crash when quitting with joiners connected
- joiner crash on quit (game bug, worked around)
- Ships: one pilot per ship, no wobbling, steering stops when the pilot gets up
- Audio: other players' building no longer sounds like your own
- "Collect logs" includes the crash trace
Known problems / not built yet
- Grinding another player's ship while standing on it fails (works while flying). Cause unknown; the host now logs the reason
- Movement prediction: walking and flying for joiners lag by their ping (turning is already instant)
- Some notifications the server sends to a specific joiner are skipped (e.g. encounter notices)
- Joiners' unlocks, GPS markers and credits are copied when they join, but don't update live during the session
- If two players have the same control panel open, one closing it can affect the other
- Strict mode doesn't stop editing someone else's blocks in a terminal you managed to open
- Other players' crouch sounds still play as if they were your own (minor)
- By design: a second player in another cockpit of the same ship has no flight control
- Not tested yet: 4+ players, long sessions