Hazard: Revenge

An educational project for building a reverse engineered engine for the Korean real-time action RPG Hazard (해저드).

All Windows and DirectX calls are mapped to SDL3 calls (located in the win2sdl directory), preserving the original game logic while enabling cross-platform compatibility on systems that support SDL3.

Note: Game assets (hazard.pak, visual.pak, music.pak) are not included and must be obtained separately.

Features

• 32-bit → 64-bit port — The engine is portable across 32-bit and 64-bit architectures.
• Windowed or fullscreen — Can be launched in either mode (see Command-line flags below).
• Optional patches — Optional patches are available in src/hpp/HazardPatches.hpp to toggle between English and Korean fonts, make intros skippable, and/or to address known bugs in the original game.
• Cross-platform via SDL — All Windows/DirectX calls are routed through SDL (2 or 3), enabling the game to run on non-Windows platforms (e.g., macOS, Linux, iOS).

Note: Has only been tested on macOS and iOS so far.

Decompilation status

<img src="https://decomp.dev/EuclidVsGauss/HazardRevenge.svg?w=512&h=256" width="512" height="256">

Installation

Dependencies

• CMake ≥ 3.16
• A C++17 compiler (MSVC, Clang, or GCC)
• SDL — one of the following discovery paths is used automatically:
  1. find_package(SDL2/SDL3 CONFIG) — preferred if SDL is installed system-wide
  2. pkg-config (sdl2 / sdl3) — typical on Linux/macOS package managers
  3. FetchContent — if SDL isn't found locally, CMake downloads and builds SDL from source (release-2.30.9 or release-3.2.0 depending on SDL_MAJOR)
• On macOS, if SDL was installed via Homebrew, the dylib is copied into the app bundle's Frameworks/ folder as a post-build step.

Build

Windows / macOS / Linux

Run make windows, make macos or make linux to build the executable, which will be placed in build-win, build-mac or build-linux accordingly. Place the asset files (hazard.pak, visual.pak, music.pak) in a directory of your choice. Open a terminal, navigate to the directory with the asset files and run the executable from that directory.

iOS

Place hazard.pak, visual.pak, music.pak in the directory ios/assets/. Place a hazard.sav in the directory to also transfer a save file.
Replace ios/Assets.xcassets/AppIcon.appiconset/icon-1024.png by a .png of your choice (same name, 1024x1024, no alpha channel). Run make ios to build the .ipa file. Transfer it to your phone and install it via sideloading (e.g. AltStore or SideStore).

Command-line flags

Run it in either fullscreen or windowed mode on Windows/macOS/Linux using any of the below flags

Flag	Effect
--fullscreen, --full-screen	Run in fullscreen (default)
--window, --windowed	Run in windowed mode

Patches

Edit src/hpp/HazardPatches.hpp and rebuild. Set the variable to 1 to enable the patch or 0 to disable the patch. Notable variables:

• PATCH_SKIP_CD_CHECK
• PATCH_SKIP_ALL_INTROS
• PATCH_USE_KOREAN_FONT (Note: Requires hazard.pak with Korean font.)
• PATCH_FIX_UNEQUIP_BUG