Need for Speed Underground — Recompiled

Android downloads / Descargas Android

Underground 1 v0.2.5

APK	Architecture
ARM64 / 64 bits	arm64-v8a, recommended
ARMv7 / 32 bits	armeabi-v7a; requires Android with 32-bit app support

Android 10+ and Vulkan 1.1+. Both APKs use the same package and signing key; install the architecture supported by your device. Original game data is required. Audio, pacing and validation details: runtime follow-up. Issue-driven changes and remaining limits: 16 October review.

English · Español

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English

A static recompilation of Need for Speed Underground (2003, PC patch 1.4, Speed.exe) into native code, built on the toolchain that already runs Need for Speed Underground 2 Recompiled natively on Windows and on Android ARM64.

The x86 executable is translated function by function into C with a patched pcrecomp (lift32), then compiled for the target. No emulator, no Wine, no JIT: the game's own logic runs as native code, and the graphics go through Direct3D 9 (DXVK on Vulkan on Android).

You need your own copy of the game. This repository contains no game files and no code generated from the game. Everything derived from Speed.exe is produced locally from your installation and is never committed.

Goals

• Windows (x86) native host as the validation platform.
• Android ARM64 and ARMv7 APKs with launcher, touch controls, gamepad support, resolution scaling, FPS limiter and native widescreen — like the NFSU2 port.
• A shared base for future ports, without merging unrelated recompilation paths (x86 here, PowerPC/Xbox 360 for Most Wanted).

Status

Stage	State
Executable analysis (Speed.exe 1.4, SHA-256 c0fad450…c074b7)	✅ Direct3D 9, 254 imports (87 % shared with NFSU2), no RTTI, no relocations
Function catalog	✅ 22,751 functions; seeds from aligned data pointers and 191 vtables
Lift to C	✅ 0 lift failures, 3 hand-written overrides (CPU probe, CRT memmove)
Windows host: build and link	✅
Sound-bank code (x86 routines inside EA .abk banks)	✅ 23 distinct blocks lifted ahead of time, matched by content at run time
Windows host: boot	✅ intro videos, front end, profile load, story-mode video
First frame, menus, races	🔧 menus reached; races not tested yet
Android APK	🔧 arm64 build installs and reaches the menus
Widescreen	⏳

Layout

config/     overrides, excluded entries and hook sites for Speed.exe
docs/       audit of what is shared with the NFSU2 project, analysis notes
scripts/    lift driver, seed generation (vtables, aligned data pointers)
src/        Windows host, runtime, Win32 shims, logging
work/       (local only) analysis copy of Speed.exe, catalog, seeds
src/recomp/gen/  (local only) generated C
src/recomp/gen_abk/  (local only) generated C of the sound-bank routines

Building (Windows)

Requirements: Visual Studio (MSVC x86), Python 3 with capstone and pefile, and a checkout of the patched pcrecomp next to this folder (patches in the NFSU2 repository, patches/pcrecomp).

source scripts/vsenv.sh x86
python scripts/data_seeds.py work/Speed.analysis.exe work/seeds_all.json   # after copying Speed.exe to work/
python scripts/run_lift.py catalog work/Speed.analysis.exe work/seeds_all.json work/catalog.json
python scripts/run_lift.py lift work/Speed.analysis.exe work/catalog.json src/recomp/gen
python scripts/abk_module.py "../Need for Speed Underground" work/abk_analysis.dll work/abk_seeds.json src/recomp/gen_abk/abk_blocks.c
python scripts/run_lift.py catalog work/abk_analysis.dll work/abk_seeds.json work/abk_catalog.json
python scripts/run_lift.py lift work/abk_analysis.dll work/abk_catalog.json src/recomp/gen_abk --prefix abk_
cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=cl
cmake --build build
build/NFSU-Recompiled.exe --windowed

The host looks for Speed.exe in a Need for Speed Underground folder next to it (or pass --game-root).

Credits

• pcrecomp — the static recompiler this project builds on.
• DXVK — Direct3D 9 on Vulkan (Android).
• The NFSU2 Recompiled project, whose runtime and tooling are reused here.

Need for Speed and Underground are trademarks of Electronic Arts. This is an unofficial, non-commercial preservation project.

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Español

Una recompilación estática de Need for Speed Underground (2003, parche 1.4 de PC, Speed.exe) a código nativo, construida sobre las herramientas que ya hacen funcionar Need for Speed Underground 2 Recompiled de forma nativa en Windows y en Android ARM64.

El ejecutable x86 se traduce función a función a C con una versión parcheada de pcrecomp (lift32) y después se compila para cada plataforma. Sin emulador, sin Wine, sin JIT: la lógica del juego se ejecuta como código nativo, y los gráficos pasan por Direct3D 9 (DXVK sobre Vulkan en Android).

Necesitas tu propia copia del juego. Este repositorio no contiene archivos del juego ni código generado a partir de él. Todo lo derivado de Speed.exe se genera localmente desde tu instalación y nunca se sube.

Objetivos

• Host nativo de Windows (x86) como plataforma de validación.
• APKs de Android ARM64 y ARMv7 con launcher, controles táctiles, mando, escalado de resolución, limitador de FPS y widescreen nativo, como el port de NFSU2.
• Una base compartida para futuros ports, sin mezclar rutas de recompilación distintas (x86 aquí, PowerPC/Xbox 360 para Most Wanted).

Estado

Etapa	Estado
Análisis del ejecutable (Speed.exe 1.4, SHA-256 c0fad450…c074b7)	✅ Direct3D 9, 254 importaciones (87 % compartidas con NFSU2), sin RTTI ni reubicaciones
Catálogo de funciones	✅ 22.751 funciones; semillas de punteros alineados en datos y de 191 vtables
Traducción a C	✅ 0 fallos, 3 reemplazos escritos a mano (detección de CPU, memmove de la CRT)
Host de Windows: compilación y enlazado	✅
Código de los bancos de sonido (rutinas x86 dentro de los .abk de EA)	✅ 23 bloques distintos traducidos de antemano, reconocidos por contenido en ejecución
Host de Windows: arranque	✅ vídeos de introducción, menú principal, carga de perfil, vídeo del modo historia
Primer fotograma, menús, carreras	🔧 llega a los menús; carreras aún sin probar
APK de Android	🔧 la versión arm64 se instala y llega a los menús
Widescreen	⏳

Compilar (Windows)

Requisitos: Visual Studio (MSVC x86), Python 3 con capstone y pefile, y el pcrecomp parcheado junto a esta carpeta (los parches están en el repositorio de NFSU2, patches/pcrecomp). Los comandos son los mismos de la sección en inglés.

El host busca Speed.exe en una carpeta Need for Speed Underground junto a él (o pásala con --game-root).

Créditos

• pcrecomp: el recompilador estático sobre el que se construye este proyecto.
• DXVK: Direct3D 9 sobre Vulkan (Android).
• El proyecto NFSU2 Recompiled, cuyo runtime y herramientas se reutilizan aquí.

Need for Speed y Underground son marcas de Electronic Arts. Este es un proyecto de preservación no oficial y sin fines comerciales.