Resident Evil 2 Is Being Rebuilt for Nintendo DS in Ambitious Homebrew Project

The Nintendo DS may be long past its commercial peak, but the handheld continues to receive remarkably ambitious community projects. The latest is Resident Evil 2: Deadly Science, a homebrew effort that is working to bring the original PlayStation version of Resident Evil 2 to Nintendo's dual-screen system.

The project is not connected to Capcom, and it is still clearly a work in progress. Even so, its developers have already demonstrated a substantial amount of the 1998 survival-horror classic running on DS hardware. The first two cutscenes are functional, the core gameplay systems are in place, and every room from the first disc is reportedly accessible. For a game built around cinematic presentation, fixed-camera viewpoints, dense pre-rendered scenery, and a broad collection of assets, that is an impressive technical target for the aging handheld.

Its name also deliberately echoes Resident Evil: Deadly Silence, Capcom's official Nintendo DS release from 2006. That game was an enhanced adaptation of the first Resident Evil, released as part of the series' 10th-anniversary celebrations. Deadly Science, however, is pursuing the sequel rather than revisiting the Spencer Mansion, giving DS owners a potential path back to Leon Kennedy and Claire Redfield's nightmare in Raccoon City.

A Full Survival-Horror Framework Is Taking Shape

At its present stage, Resident Evil 2: Deadly Science has much more to show than a character model moving through a test environment. The team says the basic loop that defines Resident Evil 2 is working: players can collect items, combine them, fight zombies, take damage, and reach a game-over state when their health is depleted. Music and sound effects are also operational.

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Most significantly, the build includes the 125 rooms found on disc one. Those environments retain many of the elements that make the original game's structure work. This includes the pre-rendered backdrops, depth information used to place characters convincingly within scenes, camera changes, collision, doors and their familiar 3D opening animations, key and lock interactions, stairways, sloped surfaces, gates, and room-specific objects such as items waiting to be collected.

The project also preserves the original zombie AI. That matters because Resident Evil 2 is not simply a game of shooting targets in corridors. Enemy behavior, limited ammunition, room layouts, puzzle items, and camera framing all contribute to the pressure of navigating the ruined police station and its surrounding locations. Retaining the original enemy logic gives the DS conversion a better chance of feeling faithful to the PlayStation game rather than merely resembling it.

Dual-screen support is one of the project's defining ideas, although the exact final interface and feature set may continue to change during development. The DS is naturally suited to handling persistent information without covering the action on the upper display, potentially creating a different way to manage maps, inventory, status information, or other game data. The developers' work is therefore more than a conventional down-port: it is an attempt to fit a landmark PlayStation game around the peculiar strengths of Nintendo's handheld.

What Still Needs Work

There is a long road between a promising technical build and a polished game that players can comfortably complete. The development team has been candid that the port remains rough. While the opening pair of cutscenes is working, the other cinematic sequences have not yet been fully implemented. That is a notable gap for a title in which story scenes, transformations, dramatic entrances, and transitions are a major part of the experience.

Visual problems are also still present. Players can see through certain walls in the current build, undermining the carefully constructed illusion created by the original backgrounds and camera angles. Some music also reportedly sounds wrong in particular places. These issues may sound small individually, but they illustrate how challenging the conversion is. Resident Evil 2 relies on its audiovisual atmosphere as much as its underlying systems, so stability and presentation will be as important as room compatibility.

Storage is another major concern. The ROM is already around 300 MB, while the team hopes to keep the final project below 512 MB. That ceiling is particularly important for a DS homebrew release, where flashcart support, SD-card usage, and emulator configuration are practical considerations. The project's asset pipeline must compress, convert, or otherwise manage a large amount of PlayStation-era data while keeping the resulting game functional on the intended hardware.

Disc one is the current focus, which means prospective players should not mistake the existing progress for a complete two-disc remake. The original Resident Evil 2 is structured around multiple character scenarios and a large amount of game data. Getting one disc's rooms and systems running is a meaningful milestone, but finishing every route, scene, asset, and edge case would be a much larger undertaking.

Reverse Engineering, Code Tools, and Human Oversight

The team is using REA, short for Reverse Engineer Anything, alongside Claude Code during the project. The use of coding assistance has already prompted discussion in preservation and homebrew circles, particularly on projects that require deep familiarity with old formats, game logic, and platform constraints. The developers have stressed that people are actively reviewing the work, examining the code, and ensuring the port functions rather than leaving the effort entirely to automated tools.

That distinction is important in a project of this scale. Converting an original PlayStation game to DS hardware involves far more than generating new code. Developers have to understand the source game's data, adapt rendering and asset systems, solve memory and performance limitations, handle input and display differences, and repeatedly test the results across emulation and real hardware. Tools can accelerate portions of that work, but they do not remove the need for technical judgement, debugging, and careful validation.

The project's open development structure also gives technically inclined fans a chance to follow its progress and potentially contribute. Homebrew ports often advance through many small fixes: a corrected background, a repaired collision boundary, a better audio conversion, a more reliable save routine, or an adjustment that makes a specific room behave as intended. With 125 rooms on the first disc alone, there is ample space for that kind of incremental improvement.

Building and Running the Current Version

The current development build is designed to be compiled by users from the project files, rather than distributed as a conventional retail-style release. The documented process requires a legally obtained dump of the European version of Resident Evil 2 disc one, specifically its first track, along with the necessary development tools. The game data is extracted and converted, then used to build an NDS ROM.

On Windows, the setup uses Ubuntu through Windows Subsystem for Linux for much of the toolchain, while melonDS can be used as the emulator. macOS and Linux users can prepare comparable dependencies through devkitPro, Python, FFmpeg, a C compiler, and related libraries. The build process then converts the disc data into the assets needed by the DS project before compiling the ROM.

Saving requires additional configuration because the homebrew build uses an SD card. On a flashcart or DSi, that means the card from which the program is launched. In melonDS, users need to enable DLDI homebrew support and configure a virtual SD card with sufficient capacity. The guidance notes that 512 MB is not enough in this situation because the emulator stores the ROM padded to that size; a 1 GB virtual card is recommended for the current workflow.

Anyone interested in experimenting with the build should remember that it remains unfinished, may change frequently, and requires ownership of the game data used in the process. It is not a replacement for an officially licensed release, nor should players expect the smoothness and completeness of Capcom's commercial DS adaptation of the first game.

A Fascinating Project for DS and Resident Evil Fans

Whether Resident Evil 2: Deadly Science ultimately reaches a fully complete state remains uncertain. The existing work nevertheless demonstrates why the Nintendo DS remains such a compelling platform for homebrew developers. Its hardware limitations demand compromises, but its enormous install base, unusual interface, and active enthusiast community continue to inspire experiments that would have sounded implausible during its original lifespan.

For Resident Evil fans, the project is especially intriguing because the DS already has a real connection to the series through Deadly Silence. A working handheld version of the second game would expand that legacy in an unofficial but technically ambitious way. The early build still has major issues to solve, from missing cinematics and visual glitches to audio polish and storage limits, yet the core accomplishment is already clear: Raccoon City is beginning to run on Nintendo DS.