[!WARNING]
Early release. Expect bugs. openOMSI is in an early stage of development: things may be
missing, broken or change between versions. Please report problems in
Issues or on our
Discord server.
openOMSI is a from-scratch recreation of the bus simulator OMSI 2, written in Rust:
64-bit, multithreaded, with a modern renderer (Metal / Vulkan / DirectX 12 through wgpu),
and fully compatible with the existing maps, buses, scenery and mods.
[!IMPORTANT]
openOMSI needs an original copy of OMSI 2. It contains no game content of its own: it
plays on the maps, vehicles and other files of an installed OMSI 2 and will not start without one.
Download
Every commit to main is built by GitHub Actions and published on the
Releases page:
Platform
File
Windows x64 / ARM64
openOMSI-<version>-windows-x64.zip / -windows-arm64.zip - run openomsi.exe
macOS (Apple silicon / Intel)
openOMSI-<version>-macos-arm64.zip / -macos-x64.zip - open openOMSI.app
Linux x64 / ARM64
openOMSI-<version>-linux-x64.zip / -linux-arm64.zip - run openomsi
openOMSI-<version>-server-linux-x64.zip (also -linux-arm64, -windows-x64, -windows-arm64) - see docs/SERVER.md
Start the game, point the launcher to your OMSI 2 folder once, pick a map, a bus and a duty,
and drive. Mods go into the folder next to the game (or through the launcher's Mods
page); the original installation is never written to.
From 0.1.7 on the launcher updates itself: when a newer release is out it asks at the start
and, with your yes, downloads it, replaces the program and starts again (on Android through
the system's installer). Settings → General → Updates switches the check off or installs without
asking.
Installation
You need an installed OMSI 2 (Steam or retail, any version) with its stock content -
the maps Grundorf and Berlin-Spandau and the stock buses (MAN SD200/SD202, NL). openOMSI
brings no game content of its own; it plays the original's maps, buses and mods.
Download the file for your system from
Releases (table above) and unpack it
into a folder of its own that you can write to - your Documents, a games folder, or the
OMSI 2 folder itself. Not Program Files: the launcher could not update itself there.
Start it.
Windows:openomsi.exe. Windows SmartScreen may warn about an unknown app: More
info → Run anyway.
macOS: open openOMSI.app. The first time, macOS may refuse an app from the
internet: right-click → Open → Open, or run
xattr -dr com.apple.quarantine /path/to/openOMSI.app once.
Linux:./openomsi (run chmod +x openomsi if it does not start). It needs a
Vulkan or OpenGL driver (Mesa: mesa-vulkan-drivers, or your GPU vendor's driver).
Android: see docs/ANDROID.md - the OMSI 2 folder is copied onto the
phone first.
Point it at OMSI 2. The launcher usually finds the installation by itself (Steam
libraries, the usual folders). If not, open Setup and choose the OMSI 2 folder - the
one with Omsi.exe, maps and Vehicles in it (the folder, or Omsi.exe itself) - and
press Save. The Steam version is under
…\Steam\steamapps\common\OMSI 2.
Drive: pick a bus, a map and a duty on the Drive page and press Start the duty.
Mods are installed on the Mods page (a folder or a .zip, or dropped on the window) or
by putting them into the Mods folder next to the game; the OMSI 2 folder is never written
to.
When something goes wrong
"The original OMSI 2 was not found" - choose the folder under Setup (step 3); the
message says what the chosen folder lacks.
The game closes after a few seconds, or "the graphics device was lost" - update the
graphics driver (NVIDIA, AMD or Intel's own, not the one Windows installs). On Windows you
can also switch to DirectX 12: Settings → Graphics → Graphics API (the launcher offers it after such a
crash).
An older graphics card (no Vulkan): openOMSI falls back to DirectX 12 and then OpenGL by
itself; Settings → Graphics → Graphics API chooses one.
Stuck at a bridge or an invisible wall on a mod map: Esc → Options → Collisions with
objects switches collisions with the map's objects off (Settings has it too).
Multiplayer: you do not meet the others - both players need the host's map (a map in
the OMSI 2 folder is not passed on; one from the Mods page is). The joining game switches
to the host's map by itself and says in the HUD when it is not installed.
Keys do not do what you set: Controls - the page shows which driving keys are in use;
a key you change there takes effect at once.
Anything else: when the game ends on an error, the launcher shows it with Copy report
and Report on GitHub. The logs are in ~/.openomsi (Windows: C:\Users\<you>\.openomsi),
game.log for the last game. Setup → Export diagnostics (or openomsi --export-diagnostics <file.zip>) saves a support package for an issue on this computer: the program, the system,
the graphics card, driver and settings, the controllers and the last game's map and bus, but
no folder paths, names, chat, LAN codes or addresses, and of the logs only which events
happened. Nothing is sent; look inside before you attach it.
Goals
1:1 behaviour. Every content format of the original - maps, splines, scenery objects,
vehicles, scripts, timetables, HOF files, fonts, weather, tickets, situations, plugins -
loads and behaves exactly as in OMSI 2.2.032. Existing maps and mods work unchanged.
No original code or assets. Nothing from the original is copied; the formats are
described in docs/FORMATS.md.
A better engine. 64-bit address space, streaming and texture loading on worker threads,
no 2 GB limit, no single-thread stalls, LAN multiplayer and a dedicated server.
openOMSI is made in free time. If you enjoy it and want to help it along, you can buy me a
coffee or support it on Ko-fi - thank you!
License
openOMSI is released under the MIT License. OMSI and OMSI 2 are trademarks of their
respective owners. openOMSI is an independent project and is not affiliated with them.
openOMSI (openOMSI-org/openOMSI)
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openOMSI 是用 Rust 从零重写的巴士模拟器 OMSI 2 复刻版，配备现代的 wgpu 渲染器（Metal/Vulkan/DirectX 12）。它能加载并游玩原版 OMSI 2 的地图、巴士和 mod，但自身不包含任何游戏内容。