fefw-recomp

fefw-recomp

A native Windows PC port of Fire Emblem: Fortune's Weave (Nintendo Switch 2), made by static recompilation. The game's code is translated to C++ and compiled into a regular Windows program, which runs on a small runtime that stands in for the console's system software and draws with Vulkan. It is not an emulator.

Features

• Runs natively on Windows, with no emulator in between
• 60 or 120 FPS modes, any output resolution, render scale and a temporal upscaler
• Ultrawide (21:9, 32:9 or any wider shape): a wider view with the menus and HUD kept at 16:9 in the centre
• Windowed, borderless or fullscreen
• Keyboard or any controller, with matching button prompts
• An in-game settings overlay (F1)
• A launcher that sets everything up from your dump, with nothing else to install

Requirements

• Windows 10 or 11, 64-bit
• A 64-bit CPU with SSE4.2 and POPCNT: an Intel Core i3 / i5 / i7 (2008) or newer, or an AMD FX (2011) / Ryzen or newer. Setup builds the game for your processor: CPUs with FMA3 (Intel Haswell 2013, AMD Piledriver 2012 and newer) get the faster build, older ones such as Sandy Bridge, Ivy Bridge and Xeon E5 v1 / v2 a compatible build that plays the same, a little slower. Older processors (Core 2, AMD Phenom) are not supported; Setup and fefw.exe say so instead of crashing
• A GPU with Vulkan 1.3 and an up-to-date driver
• 16 GB of RAM and about 30 GB of free disk space
• Your own decrypted dump of the game at update 131072, in one of these forms:
  • a folder with exefs\ and romfs\
  • a dump folder with base\ and updates\<version>\
  • a .nup package

Getting started

1. Download fefw-recomp-<version>-win64.zip from the Releases page and extract it to its own folder.
2. Run fefw-launcher.exe.
3. On Setup, choose your dump folder (or .nup file) and press Set up. The launcher checks your files, builds the game on your PC and prepares the shaders. The first setup takes a while; you can Pause it and continue later.
4. Press Play.

Your saves are in the save\ folder next to the launcher.

Linux and Steam Deck

Download fefw-recomp-<version>-linux-x64.tar.gz instead, extract it and run fefw-launcher.AppImage; the steps are the same. The game runs through Proton: Play needs Steam with a Proton installed, umu-launcher (umu-run) or Wine, or press Add to Steam on the Play page and start it from Steam (also in the Steam Deck's Game Mode). After an update, run Set up in the launcher (Desktop Mode on a Deck) before playing from Steam.

Settings

The launcher's Settings page covers resolution, frame rate, upscaling, window mode, sound and controls. Press F1 in game for the overlay. Every option is described in runtime/docs/CONFIG.md.

Game language

Settings > Language (or F1 > Game) picks the language of the game's text and voices: Japanese, English (US or UK), French, German, Italian, Spanish, Korean and Chinese (Simplified or Traditional). Automatic, the default, follows your Windows display language and uses English when the game has no translation for it. The change applies the next time the game starts.

DLSS (NVIDIA RTX only)

NVIDIA's files cannot be shipped here, so DLSS stays off until you add them. Take them from NVIDIA's Streamline SDK (v2.x, the bin/x64 folder of the release, not the development one) and put these four files in a folder named upscalers\streamline next to fefw-launcher.exe:

sl.interposer.dll   sl.common.dll   sl.dlss.dll   nvngx_dlss.dll

Then choose DLSS (or Automatic, which picks DLSS when the files and an RTX GPU are there) as the Upscaler in Settings, and restart the game. fefw.log says Streamline ... started and DLSS (Streamline) when it works. The folder can be somewhere else: set it under Settings > Picture > DLSS (Streamline) folder.

For DLSS frame generation (RTX 40 or newer, with Windows' hardware-accelerated GPU scheduling on) add five more files from the same folder: sl.dlss_g.dll, sl.reflex.dll, sl.pcl.dll, nvngx_dlssg.dll and NvLowLatencyVk.dll.

FSR 3 (any GPU)

FSR 3 needs AMD's signed FidelityFX files, which you download from AMD's FidelityFX SDK repository. Put them in upscalers\fsr next to fefw-launcher.exe (create the folder):

amd_fidelityfx_upscaler_vk.dll   amd_fidelityfx_loader_vk.dll   FSR 3 upscaling (Kits/FidelityFX/signedbin of tag v2.4.0)
amd_fidelityfx_vk.dll                                            FSR 3 frame generation (PrebuiltSignedDLL of tag v1.1.4)

Choose AMD FSR 3 upscaling as the Upscaler and/or AMD FSR 3 frame generation under Settings > Frame rate, then restart the game. Frame generation adds one generated frame between two real ones; the HUD and text are taken from the real frames, so they stay sharp. It works best with VSync off on a 120 Hz or faster display: with VSync on the game renders at most half the refresh rate, and on a display slower than twice the game's frame rate generation pauses. Settings > Picture > FSR 3 (AMD) folder shows whether the files are found, and can point to another folder. If a file is missing, fefw.log names it and the game carries on with TAAU (or without frame generation).

Keyboard and controller

Any controller works, and so does the keyboard, with no setup. The button prompts in the game follow the one you used last: press a key and they show keys, touch the controller and they show its buttons. The keyboard drives the Switch buttons the game knows:

Keys	Switch
W A S D	Left stick	Move
Arrow keys, I J K L	Right stick	Camera
Enter, Space	A	Confirm
Esc, Backspace	B	Back
R	X
F	Y
Q / E	L / R	E: dash in town
Z / C	ZL / ZR	C: map in town
Tab	+	Menu
M	-
1 2 3 4, or numpad 8 2 4 6	D-pad up, down, left, right
V / B	Left / right stick click

The movement keys push the stick all the way. F1 (settings), F2 (frame rate counter) and Alt+Enter (full screen) are the runtime's own keys. F1 > Controls lists the keys as they are now.

To change a key, close the game and edit [bindings.all] in controls.ini in the run folder (the game creates it on its first start). Each line is key = action:

[bindings.all]
W = move_forward
Return = btn_a
G = btn_x
X = none

Left side: a key name (Return, Space, Left Shift, Up, Keypad 8 ...). Right side: move_*, look_*, dpad_*, btn_a, btn_b, btn_x, btn_y, btn_l, btn_r, btn_zl, btn_zr, btn_plus, btn_minus, btn_lstick, btn_rstick, or none to switch a key off. An older controls.ini gets the keys above added at the next start (only keys you have not bound yourself; the old file is kept as controls.ini.bak). To go back to the default keys, delete the [bindings.*] sections. Controller options (stick dead zones, button mapping, prompts) are under Settings and F1 > Controls.

Mouse

The game has its own mouse controls, made for the Switch 2's Joy-Con 2 used as a mouse, and the PC mouse drives them. Move the mouse or click and the game switches to its mouse controls (its prompts show mouse buttons); press a key or touch the controller and it switches straight back. Whichever you used last is in control.

• Bases, dungeons: the mouse turns the camera, left click talks, opens and attacks, right click cancels or opens the menu, the wheel zooms the camera while standing still. Walk with WASD or the stick.
• Battle maps: the mouse moves the map cursor (faster when you move it faster), left click selects and confirms, right click cancels.
• Menus: moving the mouse up or down moves the selection, left click confirms, right click goes back.

While the game is in its mouse controls the Windows pointer is hidden and kept in the window (it comes back where the game's pointer was). A key, the controller, Alt+Tab or F1 frees it. The game's own System > Mouse Controls page shows every button, and its System > Settings set the speeds: the rows marked (Mouse) on the General, Battle and Bases/Dungeons tabs (camera sensitivity, map cursor speed, menu cursor speed), and Method for Switching to Mouse, which should stay automatic. Leave the game's angle calibration alone (a desk mouse needs none; Reset Calibration undoes it). F1 > Controls > Mouse has the PC side: mouse controls automatic, always or off, and the mouse speed before the game's own ([mouse] jc2_speed in controls.ini).

On battle maps, hold Y (keyboard F) to move the cursor faster with the stick or keys.

DLC

DLC is used when you dump it from your own copy, like the game. Put each add-on in dlc\<title id>\romfs of your dump folder (next to exefs\ and romfs\, or next to base\ and updates\). A .nup with add-ons is unpacked that way on its own. The Play page lists the DLC it found.

Mods

RomFS mods go in the mods\ folder next to the launcher (Play > Open mods folder), in the layout emulators use: mods\<mod name>\romfs\.... Files in a mod replace the game's files at the same path. If two mods change the same file, the mod whose name sorts last wins, so you can name them 01-... and 02-.... Rename a mod to start with - or _ to turn it off. Code mods (exefs .ips / .pchtxt patches) do not work, because the game code is compiled ahead of time.

Updating to a new release

Extract the new zip to a new folder, copy your save\ folder (and mods\, if you use mods) into it, and run Set up again.

Troubleshooting

• "These game files are a different version": only update 131072 is supported. Check that you dumped the update, not only the base game.
• Setup stopped or failed: press Set up again to continue where it stopped. Open full log on the Setup page shows what went wrong.
• The game closes or freezes: look at fefw.log in the launcher's folder, and update your GPU driver.

Reporting problems

Open an issue with fefw.log, your GPU, driver and Windows version, and the release you used. Please do not attach game files or anything made from them.

Building from source

See docs/BUILDING.md. Contributions are welcome.

Credits

This project stands on the work of others. Thank you.

• nxrecomp by drakolordx7: the recompiler this is built on.
• pokopia-recomp (drakolordx7) and featureJosh/pokopia-recomp (featureJosh): the runtime, tools and launcher this project started from (GPL-3.0).
• drakolordx7/switch2-recomp: the launcher design this launcher follows.
• nxnative-penis6 by seedds (MIT): the movie decoder front end, its dav1d copy and several hardware facts (notices in runtime/THIRD_PARTY_NOTICES.md).
• Kompas9's Switch-Game-Patches (MIT): the Fortune's Weave ultrawide patch, whose sites and findings [fefw] ultrawide re-implements as runtime hooks.
• Ryujinx / Ryubing (MIT): the shader translator and tiling code; Mesa NAK (MIT).
• SuperMarioWonderRecomp (MIT); smo-recomp, ScarletNX and ssbu-recomp (GPL-3.0); yuzu and Eden (GPL); libnx (ISC); LLVM libc++abi (Apache-2.0 with LLVM exceptions).
• Hookshot (GPL-3.0) and SkyboundTotk: the RomFS mod folder layout and rules followed here, so mods work the same in both.
• zbic by Yannik Marchand (GPLv2; installed by pip at setup, not included here): ZBIC decompression.
• dav1d (BSD-2-Clause), libvpx (BSD-3-Clause), Zstandard (BSD), SDL3 (zlib), volk, VulkanMemoryAllocator, Dear ImGui (MIT), Vulkan-Headers (Apache-2.0 or MIT).
• astc-encoder (Apache-2.0), bc7enc_rdo (MIT or public domain), ISPC (BSD-3-Clause).
• AMD FidelityFX / FSR SDK headers (MIT), NVIDIA Image Scaling (MIT), NVIDIA Streamline headers (MIT). No AMD or NVIDIA binaries are included; FSR and DLSS files are not distributed.
• Sascha Willems' Vulkan samples (MIT): the stand-in shader test corpus.
• Kenney input prompts (CC0), DejaVu fonts, Tauri, Lucide icons (ISC).

Licence texts: runtime/THIRD_PARTY_NOTICES.md, recomp/THIRD_PARTY.md, tools/*/licenses/, tools/textures/THIRD_PARTY.md and the licence files inside runtime/third_party/. All of these licences are compatible with the GPL-3.0 this project is released under.

License

GPL-3.0 (LICENSE). Third-party code keeps its own licence.