RPBB Static Recomp — Rocket Power: Beach Bandits (GameCube, Windows)

A native Windows port of Rocket Power: Beach Bandits (GBQE78, USA). The playable release runs on ModernGekko's JIT core at a locked 60 FPS, with DSP LLE audio and SDL controller input. The repository also contains the DolRecomp static C module (545,088 instructions, 0 unknown) that was built during the reverse-engineering work; it runs the same game at 40–45 FPS and is kept as the static-recompilation artefact.

This repository contains no game data. You must supply your own legally dumped copy of the USA disc (GBQE78).

Works with RecompLauncher

This release supports RecompLauncher: install the recomp, pick your own ISO or extracted folder, choose resolution and graphics, and press Play. The included recomplauncher.json provides:

• Easy setup — pick the USA ISO (or extracted folder); the setup helper verifies the disc's GBQE78 ID and DOL hash, and the launcher checks the ISO against the verified Redump USA dump.
• Settings — internal resolution from 1x (640×528) to 12x (7680×4320), graphics API (Vulkan / D3D12 / OpenGL), window mode and the FPS title display.
• Full setup — the ISO is extracted to a local game folder by rpbb-launcher.exe, with progress shown in the launcher; the verified dump gets the RecompLauncher badge.

Requirements

• Windows 10 or 11, x64.
• A Vulkan-capable GPU (D3D12 and OpenGL are selectable if Vulkan has driver issues).
• A controller. The bundled profile is for a DualSense; other SDL controllers can be mapped in Config/GCPadNew.ini.
• Your own Rocket Power: Beach Bandits (USA, GBQE78) disc image (.iso) or an extracted game folder containing sys/main.dol and files/.

The verified dump is the USA release (DL-DOL-GBQE-USA), 1,459,978,240 bytes, CRC32 8BE53CE8.

Play

RecompLauncher (recommended)

Install the latest release from RecompLauncher, open the game, and pick your copy. The first setup extracts an ISO automatically. Press Play.

Standalone

1. Extract the release zip.
2. Run rpbb-launcher.exe and pick your USA ISO or extracted game folder (a folder in game/ and a RecompLauncher extraction are detected automatically).
3. Set resolution, graphics API and window mode, then press Play. The first ISO run extracts the disc to %LOCALAPPDATA%\RocketPowerRecomp\game.
4. rpbb.exe is the game runtime; the launcher starts it in JIT mode at 60 FPS.

run.bat and rpbb-launcher.exe also work from the command line:

rpbb-launcher.exe --prepare --game "D:\dump.iso" --user-dir "%LOCALAPPDATA%\RocketPowerRecomp"
rpbb-launcher.exe --game "D:\dump.iso" --user-dir "%LOCALAPPDATA%\RocketPowerRecomp"

For an extracted folder, point --game at the folder.

Settings

In RecompLauncher the settings appear on the game's page and in Big Picture mode. They are stored under %LOCALAPPDATA%\RocketPowerRecomp:

Setting	File	Key
Internal resolution	config.ini	Video/resolution (640x528 to 7680x4320)
Graphics API	command line	`--graphics vulkan
Window mode	command line	`--window-mode borderless
Aspect ratio	config.ini	Video/aspect (auto, wide, standard, stretch)
Widescreen hack	config.ini	Video/widescreen_hack (true / false)
Show FPS	config.ini	Video/show_fps_in_title
Audio output	config.ini	Video/mute, Video/volume

The launcher offers the same resolution presets as the SpongeBob recomp: 1x (640×528), 2x (1280×720), 3x (1920×1080), 4x (2560×1440), 6x (3840×2160), 8x (5120×2880) and 12x (7680×4320). The label is the internal render resolution, not the window size.

Window modes:

• Fullscreen windowed (default) — borderless at your desktop resolution.
• Fullscreen — switches the display to your monitor’s native resolution at 60 Hz and restores the desktop mode when the game exits.
• Windowed — the runner’s normal window.

Defaults: Vulkan, 3x internal resolution (1920×1584, suitable for 1080p), auto framing, 60 FPS speed limit, DSP LLE, Cubeb audio.

Widescreen

The launcher and RecompLauncher expose the same framing options as the SpongeBob recomp:

• Aspect ratio — Auto (game native) keeps the game's 4:3 framing; 16:9 widescreen fills a widescreen display; 4:3 standard forces 4:3; Stretch stretches the 4:3 image to the window.
• Widescreen hack (stretch 3D) — widens the 3D projection to match 16:9. Enable it together with 16:9 widescreen for a full-width 3D picture.

The 3D scene fills 16:9 correctly; the 2D HUD may stretch horizontally. Menus and other 2D screens may still render with their original 4:3 framing.

Audio

The game uses a custom DSP microcode. DSP HLE produces silence, so the release uses DSP LLE. The required DSP ROM/coefficient files are in Sys/GC.

If the game is silent, check the Windows volume mixer: rpbb must not be muted. Audio is in sync at 60 FPS.

Saves

The game uses a folder-based memory card:

%LOCALAPPDATA%\RocketPowerRecomp\GC\USA\Card A\

RecompLauncher backs this folder up after each session. To bring saves from Dolphin, copy the .gci files from your Dolphin memory card into that folder. Card images (.raw, .mcd) are not read directly.

Controls

The bundled defaults/GCPadNew.ini maps a DualSense. The GameCube controls are:

GameCube	Action	DualSense (bundled)
A	Jump / confirm	Cross
B	Cancel / attack	Circle
X / Y	Actions	Square / Triangle
Start	Pause	Options
Left stick / D-pad	Move	Left stick / D-pad
C stick	Camera	Right stick
L / R	Triggers	L2 / R2

For an Xbox or Switch Pro controller, edit Config/GCPadNew.ini and set the Device line to the SDL name of your controller, or delete the file to use SDL's default mapping. A controller is required; this build has no keyboard gameplay mapping.

Verified dump

Name	Nickelodeon Rocket Power: Beach Bandits (USA)
Disc ID	GBQE78 (Redump: DL-DOL-GBQE-USA)
Size	1,459,978,240 bytes
CRC32	8BE53CE8
DOL SHA-256	5F73B291A1B8C33A7CEBDA40638F00F74FF7FAF3A5F3877190CD30B628FFA42D

How it works

• The static module is generated by DolRecomp from the game's DOL: 545,088 instructions, 0 unknown, 134 C chunks. Clang -O3, ThinLTO, PGO, x86-64-v3.
• The playable release uses ModernGekko's JIT core (MODERNGEKKO_STATICRECOMP=0) because it holds 60 FPS with headroom on the tested hardware (Ryzen 7 7800X3D). The static module is the project's recompilation artefact and reaches 40–45 FPS on the same scenes.
• Graphics run through Dolphin's Vulkan backend, audio through DSP LLE + Cubeb, and input through SDL.
• rpbb_launch.exe extracts a GameCube ISO's Dolphin layout (sys/ + files/), verifies the DOL hash, writes default settings and starts the runner.

Building

The release is built from the DolRecomp + ModernGekko pipeline in the SB-RFD checkout. The static module build recipes are in tools/build_pgo_*.bat and the runtime launcher is tools/run_rpbb_jit.ps1. The generated module and the game data are not committed.

Release packaging:

powershell -ExecutionPolicy Bypass -File tools\make_release_rpbb.ps1 -Version 0.1.2

This writes dist/RocketPower-Recomp-v0.1.2-Windows-x64.zip with recomplauncher.json at the top of the release folder, next to rpbb.exe and rpbb-launcher.exe.

Layout

tools/      build, packaging and launcher helpers
docs/       project state and investigation notes
defaults/   controller profile shipped with the release
work/       extracted disc, game root, logs and evidence (ignored)
build/      recompiler output (ignored)
lib/        upstream recompiler/runtime checkouts (ignored)

Licenses

The runtime contains Dolphin-derived code (GPL-2.0) and DolRecomp. See LICENSES/ in the release. No game files are included or redistributed.