SpeedBreakerProject--speedbreaker/scripts/steamos/bundle

SpeedBreaker for Steam Deck, Steam Machine and Linux PCs

An unofficial static recompilation of the Xbox 360 version of Need for Speed: Most Wanted (2005): a native port, not an emulator. A fan project by project(u), not affiliated with, endorsed by or sponsored by Electronic Arts or Valve.

This is the x86-64 SteamOS download (the Steam Frame has its own, the arm64 one). This folder has the launcher, speedbreaker.sh, and in lib/ the game program and the libraries it needs. Always start the game with speedbreaker.sh (your Steam shortcut does): the program in lib/ can't start on its own, since the launcher picks the libraries it runs with. It has no game data: you need your own disc image of your own Xbox 360 disc of the game (an .iso), and the game installs itself from it on the first run. VERSION says which release this is.

It runs on SteamOS as it is and needs no distrobox or developer tools. Tested on a Steam Deck OLED (SteamOS 3.9) and a Steam Machine (SteamOS 3.8). On other Linux distributions it hasn't been tried yet; run speedbreaker.sh there too.

1. Unpack

In Desktop Mode (Steam button > Power > Switch to Desktop):

1. Make a Games folder in your home folder (Dolphin: Home, right-click > Create New > Folder), if there isn't one.
2. Move the .tar.xz file into it, right-click it > Extract > Extract archive here. You get ~/Games/SpeedBreaker/.

Or in a terminal (Konsole):

mkdir -p ~/Games && tar -xf ~/Downloads/SpeedBreaker-steamos-x86_64.tar.xz -C ~/Games

To check the download first (optional), with its .sha256 file next to it: cd ~/Downloads && sha256sum -c SpeedBreaker-steamos-x86_64.tar.xz.sha256 should say OK.

Keep the folder on the internal storage or on an SD card that SteamOS formatted (ext4): SteamOS doesn't mount a card formatted for Windows (FAT32, exFAT, NTFS) in Game Mode, and its files can lose the "executable" mark the program needs. No :, ; or $ in the names of the folders it's in (not "Need for Speed: Most Wanted"): the game can't start from there.

To update later, unpack the newer download over the same folder (the same command, or Extract archive here, letting it overwrite). Your Steam shortcut keeps working, and your saves, settings and the installed game are kept (they're elsewhere, below, or in this folder's data/ in portable mode, which an update leaves alone), so no disc image is needed. Over v0.1.0, which kept the program at the top of this folder, the first start removes that old copy. Settings menu > Advanced > Check for Updates says whether a newer one is out. Nothing is checked online unless you press Check for Updates.

2. Add it to Steam

Still in Desktop Mode: Steam > Games > Add a Non-Steam Game to My Library > Browse. Set the file type to "All Files", pick ~/Games/SpeedBreaker/speedbreaker.sh, then Add Selected Programs. You can rename the shortcut (it's called speedbreaker.sh) in its Properties. Leave its Compatibility setting off: this is a Linux program, and Proton can't run it.

Then go back to Game Mode and start it from your library (Non-Steam).

3. Your disc image

Put your .iso in Downloads (~/Downloads), or on the SD card (its top folder, or one folder down). The first run looks there by itself (also in your home folder, Desktop, Documents, Games, USB drives and EmuDeck's Emulation/roms/xbox360), so you can pick it with the controller. SteamOS only mounts an SD card or USB drive by itself when it's formatted the Deck's way (ext4): one written on a PC (exFAT, FAT32, NTFS) isn't there in Game Mode, so in Desktop Mode open it in Dolphin and copy the .iso into Downloads.

The installer highlights the image it found (marked "Ready to install"; with several, pick yours with Up and Down): press A, then A on Install. Use the images it finds rather than "Browse for image...", whose file browser may not show in Game Mode. It checks the image first (the right game and version, nothing missing), then copies and checks every file: about 7 GB, a few minutes at most. You choose where it goes with left and right: the internal storage, the SD card, or "Choose a folder...", which opens a folder picker (press A on it). An empty folder is used as it is; a folder that already holds files gets a new SpeedBreaker Game folder inside it (the top of a card or drive gets speedbreaker/game, like the SD card's own entry). The picker opens in Desktop Mode only: in Game Mode the installer says so. Pick a folder on the internal storage or on a card or drive formatted by SteamOS, or Game Mode won't find the game. Afterwards you can delete the .iso.

From a terminal, the same install: ~/Games/SpeedBreaker/speedbreaker.sh --install ~/Downloads/<your image>.iso (add --dest <folder> to install into exactly that folder: the game remembers it, in Game Mode too).

Controls

• The Deck's controls work as an Xbox 360 controller through Steam Input (leave it on, with the default Gamepad layout).
• Settings menu: hold View (the button left of the screen, two squares) and press Menu (right of the screen, three lines). The game pauses while it's open. D-pad picks, left/right changes, A toggles, L1/R1 turn pages, B closes. With a keyboard: F1.
• Stick deadzones and vibration are in the settings menu.

Screen

• The Deck's screen is 16:10 and the game is 16:9. By default (Settings > Display > Aspect Ratio: Fill Screen) it fills the screen with a slightly taller view, the HUD kept at 16:9; choose 16:9 there for the console's picture with thin bars above and below.
• Steam Deck OLED: set the refresh rate to 60 Hz (Quick Access menu > Performance, the battery icon > Refresh Rate; turn on Advanced View if it isn't shown). The game runs at 60 frames a second and times itself to a screen at about 60 Hz. At 90 Hz it can't: its frames then stay on screen for one refresh, then two, which looks like stutter. On either model, keep the refresh rate at 60 (lowering it to save battery brings the same stutter) and leave the Framerate Limit off.
• Docked to a TV or monitor: in the shortcut's Properties > General > Game Resolution, choose Native, or Steam gives the game 1280x800 of the bigger screen.

Performance

On a Steam Deck OLED it runs at 60 frames a second most of the time at its own resolution; the busiest scenes can dip below. A Steam Machine holds 60 at 3440x1440, Internal Resolution 3x2 included. To see what yours does: Settings menu > Advanced > Performance Overlay, or Steam's own performance overlay (Quick Access > Performance).

On a laptop with two GPUs (one built into the processor, and an NVIDIA or AMD graphics card), the game runs on the graphics card. last-run.log lists the GPUs it found and the one it uses (the [video] Vulkan devices: line). To use another, add NFSMW_GPU=<its number or part of its name> to the launch options, e.g. NFSMW_GPU=intel %command%. With NVIDIA's driver, the launcher also turns on NVIDIA's PRIME render offload (__NV_PRIME_RENDER_OFFLOAD=1; a value you set yourself is kept).

Reporting problems

Settings menu > Advanced > Save Bug Report puts the recent logs, any crash reports, your settings, a system summary and a screenshot in one .zip on your Desktop (speedbreaker-bug-report-v<version>-<date>_<time>.zip). Nothing is uploaded: attach it to an issue at https://github.com/SpeedBreakerProject/speedbreaker/issues and say roughly when in the session it happened (in minutes). Please never attach game files or disc images.

Each run also writes last-run.log in this folder (~/Games/SpeedBreaker/); the run before is kept as previous-run.log. If the game crashes, the log ends with where in the program it was.

Where things are

• Saves and settings.toml: ~/.local/share/speedbreaker/.
• The installed game: game/ in that folder, or the SD card's speedbreaker/game, or the folder you chose. The game remembers where it is; if that card or drive isn't there when it starts, it says so.
• Shader caches (safe to delete): ~/.cache/speedbreaker/.
• In portable mode (below), all of these are in this folder instead.
• speedbreaker.sh --where prints where the game, your data and the caches are.
• To uninstall: delete this folder, ~/.local/share/speedbreaker/ (that deletes your saves too), ~/.cache/speedbreaker/ and the game's folder if you chose one, and remove the shortcut from Steam.

Portable mode

To keep everything in this folder (your saves and settings, the logs, the shader caches and the installed game), so the whole folder can be moved or copied to another Steam Deck, Steam Machine or Linux PC and played there, make an empty file named portable.txt here, next to speedbreaker.sh (Dolphin: right-click > Create New > Text File; or touch portable.txt in Konsole). From then on:

• Saves, settings.toml and logs (with crash reports and what Save Bug Report collects) are in data/ here, and the game installs into data/game. Shader caches go in cache/ (safe to delete; another machine's graphics card rebuilds its own).
• Nothing is read from or written to ~/.local/share/speedbreaker or ~/.cache/speedbreaker.
• The installer's To row offers this folder (and Choose a folder..., which still takes any folder; one outside this folder won't move with it).
• Unpacking an update over the folder keeps portable.txt, data/ and cache/.

Making the file starts fresh: the first start installs the game into data/game and settings start at their defaults. To bring what you have now along instead (settings, saves and the installed game), don't make the file yourself; run this in Konsole:

~/Games/SpeedBreaker/speedbreaker.sh --portable on

It copies ~/.local/share/speedbreaker into data/ and the game into data/game (checking every file, a few minutes), then makes portable.txt. Nothing is deleted: the old copies stay until you delete them. To go back, speedbreaker.sh --portable off copies data/ back to ~/.local/share/speedbreaker (anything already there is kept, renamed to speedbreaker.before-portable-off-<date>-<time>) and removes portable.txt. Deleting portable.txt by hand goes back too, to whatever ~/.local/share/speedbreaker held before, with nothing copied.

To move it: copy or move the whole folder (with data/, which holds the game: about 7 GB), then add speedbreaker.sh to Steam again on the other machine (step 2). The game finds itself wherever the folder is. Keep the folder on internal storage or on a card or drive formatted by SteamOS (ext4): from one formatted for Windows (exFAT, FAT32, NTFS) the program may not start (Game Mode doesn't mount such drives, and files there can lose the "executable" mark), though such a drive is fine for carrying a copy. On a read-only drive the game plays but says it can't keep settings or saves. Portable mode is for SteamOS and Linux; the Mac app keeps its data in the Mac's own folders.

Licenses

SpeedBreaker is free software under the GNU General Public License, version 3 or later (GPL-3.0-or-later), Copyright (C) 2026 project(u) and SpeedBreaker contributors. What it is built from and the bundled libraries keep their own licenses: see licenses/ (THIRD_PARTY_NOTICES.md lists them all). The source is at https://github.com/SpeedBreakerProject/speedbreaker. bundle-info.txt says what this build is and SHA256SUMS lists every file's checksum.

"Need for Speed" and "Most Wanted" are trademarks of Electronic Arts Inc. Steam, Steam Deck, Steam Machine, Steam Frame and SteamOS are trademarks of Valve Corporation.