FlatOut 2 Mods

Runtime mods for the current Steam version of FlatOut 2.

The hooks use exact executable signatures. Experimental features are marked below.

Mods

• fo2_orbit_camera: instant right-stick orbit control for the chase camera. Other camera modes stay untouched.
• fo2_zpatch_reimpl: widescreen and FOV fixes, startup skips, frame pacing changes, local split screen, and optional menu-car limit patches.
• fo2_xinput_rumble: XInput controller rumble with directional feedback and gameplay-event rumble.
• fo2_skip_track: music track skip from keyboard or controller.

Install

Download the release zip for the mod you want, then extract it into the FlatOut 2 folder next to FlatOut2.exe.

ASI-based mods include winmm.dll, the known-good Ultimate ASI Loader build used for this game:

• SHA-256: 9A2BB218AB014FA4AD56104108C26AE48BF3E22595C126CD4F41367C799DA722
• File version: 1.0.0.0
• Description: Ultimate ASI Loader

Avoid dxwrapper.dll with these mods unless you specifically need it. It can make frame pacing worse.

fo2_orbit_camera

Source: modules\orbit_camera

Install files:

• fo2_orbit_camera.asi
• fo2_orbit_camera.ini
• winmm.dll

The mod controls only the stock chase camera. Cockpit, hood, bumper, replay, crash, and other camera modes stay untouched.

The right stick selects an absolute chase-camera angle:

• idle or forward: native chase view
• right: right-side view
• back: rear-facing view
• left: left-side view
• diagonals: intermediate angles

The camera snaps directly to the selected angle. It does not accumulate rotation, ease toward the target, or apply a speed limit. Releasing the stick returns control to the native chase camera.

The mod keeps separate input state for each local player. It rotates the native chase-camera offset before the game handles collision, field of view, and shake. fo2_orbit_camera.ini controls the deadzone, radial response curve, axis inversion, and input source.

Source=Auto reads the assigned SDL gamepad when the verified Zoom Platform build is present. Otherwise it reads the game's DirectInput state for stock pads or the split-screen adapter state for player four. If the plugin cannot identify the assigned device, it leaves the camera alone.

fo2_zpatch_reimpl

Source: modules\zpatch_reimpl

Install files:

• fo2_zpatch_reimpl.asi
• fo2_zpatch_reimpl.ini
• fo2_splitscreen.bfs
• fo2_splitscreen_filesystem
• winmm.dll

Default fixes:

SkipLicenseScreen=1
SkipIntro=1
UncapFPS=1
FramePacingFix=1
RemoveVSync=1
BorderlessWindowed=0
WidescreenFix=1
WidescreenFix_FOVScaling=1
SplitscreenFix=0
SplitscreenPostProcessingFix=0
SplitscreenZoomInputFix=1
MenuCarBackfaceCulling=0
MenuCarMaxModelFileSize=524288
MenuCarMaxSkinFileSize=2097152
MenuCarMaxSurfaces=16

Feature notes:

• SkipLicenseScreen hides the license/copyright artwork and removes its five-second startup delay.
• SkipIntro bypasses the startup intro videos.
• UncapFPS unlocks rendering while keeping the original game timing interval intact.
• FramePacingFix improves the stock frame gate by removing the old Sleep(1) yield that can cause uneven pacing on modern Windows.
• RemoveVSync requests immediate D3D9 presentation.
• BorderlessWindowed is available but disabled by default.
• WidescreenFix and WidescreenFix_FOVScaling fix ultrawide/widescreen menu, garage, and race camera behavior.
• SplitscreenFix is an opt-in local multiplayer prototype for two, three, or four players. The party screen assigns one distinct input device to each player.
• Three players use keyboard plus two pads. Their viewports occupy the top-left, top-right, and bottom-left cells of a 2x2 grid.
• Four players require keyboard plus three pads. The third pad must appear as XInput user 2 when the input manager starts. If that adapter does not install, the menu stays capped at three players. Four-pad play without a keyboard is not supported.
• Split orientation is selected at runtime from the split-screen party setup and persisted by the ASI in fo2_splitscreen_layout.lua. Vertical uses left/right viewports and Horizontal uses top/bottom viewports; missing or invalid state defaults to Horizontal, which is also the safe fallback if native layout support cannot be installed. BED scripts never load the state file directly; a native Input query reports the authoritative active layout and capability.
• SplitscreenPostProcessingFix is a separate experimental opt-in. It performs the shared post-process once with a full-device viewport and restores the final player viewport afterward; leave it off if a shader shows seams or edge artifacts.
• SplitscreenZoomInputFix is version- and capability-gated Zoom Platform compatibility. For the verified Zoom build it translates Zoom-synthesized Return back to the originating pad slot during split ready prompts without suppressing the input. Unknown/no-Zoom installations keep the core split fix unchanged.
• MenuCarMaxModelFileSize and MenuCarMaxSkinFileSize raise the menu preview input allocations. Their defaults match the stock game.
• MenuCarBackfaceCulling enables counter-clockwise culling for the menu car. It is off by default.
• MenuCarMaxSurfaces replaces the fixed material and surface tables with bounded storage. Stock is 16. Keep that default unless a menu model needs more records.

fo2_xinput_rumble

Source: modules\xinput_rumble

Install files:

• dinput8.dll
• fo2_xinput_rumble.ini

This is a DirectInput 8 proxy that forwards the game's normal input calls and adds XInput rumble for modern controllers.

It supports:

• player damage rumble
• player contact/collision rumble
• car-to-car impact rumble
• object/rubble contact rumble
• scrape/wall-hug rumble
• rough landing feedback
• directional rumble bias, so left/right impacts can favor the corresponding motor
• configurable strength, duration, cooldown, envelopes, and synthetic button-test rumble

The default config is tuned for an Xbox-style controller on controller index 0.

The rumble module has one output channel. In split screen, events from any local player can currently reach that configured controller. Per-player rumble routing is not implemented.

fo2_skip_track

Source: modules\skip_track

Install files:

• fo2_skip_track.asi
• fo2_skip_track.ini
• winmm.dll

Default controls:

hotkey_vk=78
controller_buttons=LEFT_SHOULDER

78 is the Windows virtual-key code for N.

The mod hooks FlatOut 2 music playback routines and requests a new track selection when triggered, thus skipping current track.

Build

Requirements:

• Windows
• PowerShell
• Visual Studio 2022 C++ build tools with the x86 toolchain
• Rust/Cargo and internet access for the first build only. The build downloads the bfstool 1.1.0 source crate, verifies its pinned SHA-256, and compiles it into the ignored .tools\ cache. Later builds reuse the verified cached tool.

Build all mods:

powershell -ExecutionPolicy Bypass -File .\build.ps1

The top-level build creates dist\ with all runtime files:

• winmm.dll
• fo2_orbit_camera.asi
• fo2_orbit_camera.ini
• fo2_zpatch_reimpl.asi
• fo2_zpatch_reimpl.ini
• fo2_splitscreen.bfs
• fo2_splitscreen_filesystem
• dinput8.dll
• fo2_xinput_rumble.ini
• fo2_skip_track.asi
• fo2_skip_track.ini

Install the built files to the default Steam path:

powershell -ExecutionPolicy Bypass -File .\install.ps1

Each module also has its own build.ps1 for building only that mod.

The split-screen BFS is a generated artifact, not versioned source. Its two inputs live under modules\zpatch_reimpl\assets\splitscreen; the zpatch module build creates a v2/file-version-05050420 archive, checks that it lists exactly the two expected BED paths, extracts it to a temporary directory, and verifies both payload hashes before the top-level build copies it into dist\. The 19-byte fo2_splitscreen_filesystem file is likewise regenerated without a BOM or trailing line ending.

bfstool 1.1.0 does not produce byte-identical archive metadata on every run because some equal-frequency Huffman metadata is emitted from randomized map iteration. Builds are therefore reproducible semantically (same paths and payload hashes), but the generated BFS SHA-256 may differ between builds.