MafiaCoop 0.14.0 (pre-release, fixes untested)

Pre-release. The fixes are not yet tested in game. These are fixes from the first test of 0.13.0 on two PCs. Every session now also writes a detailed sync record, so the next test can be measured. Read the known issues before you play.

Download MafiaCoop-0.14.0.zip, extract it anywhere (not into the game folder) and run MafiaCoop.exe. The zip's README.txt covers requirements, hosting and joining, settings, the optional start-from-Steam mode and uninstalling. MafiaCoop-0.14.0-symbols.zip holds the PDBs and is only needed to read crash dumps. Both players should use 0.14.0. The messages are the same as 0.13.0, so a 0.13.0 player can still connect, but only 0.14.0 has the fixes and writes the records.

Requirements

• Windows 10/11, 64-bit
• Mafia: Definitive Edition that you own on Steam, Steam build 16502642 (the current one); Steam running
• Everyone in a session on the same mod version; joining by IP needs UDP port 27960 open on the host

Fixed (from the 0.13.0 test)

• Cars didn't roll on the other screen. Every car the other player drove stopped using its own physics within seconds and went back to being moved every frame.
  • The copy's engine is now started and kept running.
  • The copy is given its speed back after every correction.
  • If it still gets stuck, its physics is tried again after 5 to 40 s instead of never.
  • The log checks three times per car whether moving a car stops it.
• Running and sprinting players were up to 3 m ahead of their character. The game's AI sprint is slower than a player's.
  • The character now runs up to 1.8x its normal speed and learns a slow gait faster.
  • When even that isn't enough, the missing speed is made up with small steps, so it keeps up instead of being put back every few seconds.
• The car door animation was cut short after 1 s. A setting was read before it was set; the character now gets the full 4 s.
• Characters thrown out of seats still happens, but every time it does the log now says how.

New: sync records

• Every co-op session writes logs\trace\mafiacoop-<date>-<time>.trace. It records:
  • every position sent and received
  • what the mod decided for every character and car
  • what the game really did, such as the car controls, engine, gear and front wheel angle
  • NPC positions
• That's about 250 MB an hour; only the newest 20 files are kept.
• The last five logs are kept instead of one.
• After a test, zip the whole logs folder on both PCs and send both.

Known issues

• None of these fixes have been tried in game yet.
• Lights, horn, siren and indicators aren't synced.
• Enemies only a friend's game spawned (he got somewhere first) are his alone. The host doesn't see them.
• Mission cars partly done: handing the car back when the host gets out wasn't checked. Ambient traffic, pedestrians and police are each player's own.
• Failed missions still take two loads. A mission timer running out wasn't tested.
• Story co-op tested in a few chapters only (Omerta, Taxi, Bon Appetit and a few chapter starts)
• The co-op panels weren't tried with a physical gamepad.
• No automatic reconnect after a disconnect
• Punches are disabled by the game near Salieri's bar and at some checkpoints

Steam invites between two PCs work (checked in the 0.13.0 test).

Unofficial fan-made mod, not affiliated with 2K, Hangar 13 or Valve. Changes: CHANGELOG.md.