A number of patches are available for RB1, RB2, RB3 and VII. They can stop nearly all game crashes, improve the player experience. Under Linux there are also a number of bugs and performance issues, but these can be resolved.
Linux instructions assume Arch Linux (thus applies to Steam Deck).
Patches are also a type of ornament in Neptunia, in RB1 they nullify status effects, and in later games improves accuracy.
Extended RAM or 4 GiB Patch
Neptunia games are built as 32-bit Windows executables, which by default can only address 2 GiB of memory leading to crashes when loading too many assets. In all Neptunia games 4 GiB is sufficient where even though the developers forgot to free unused memory, the game will not crash due to this issue even during a single session 100% playthrough.
The easiest, user friendly way to apply this patch is to use '4GB Patch', 'CFF Explorer' or 'Explorer Suite' software developed by NTCore. Always watch out for fake software. The '4GB Patch' should not require installation.
Manually editing the PE header
| Name | Offset | Bytes |
|---|---|---|
| Section Table Pointer | 0x3C
|
4 |
| Characteristics | Section Table Value + 0x16
|
2 |
For RB1, RB3, RB2 (rev84/GOG/Steam) the offset to Characteristics word should be 0x0176.
For RB2 (rev85/dev) the offset should be 0x0186
For Neptunia games it should be changed from 02 01 to 22 01 (bitwise OR 0x20)
Modding (Nepstatic, Retranslation)
Nepstatic (for RB1, RB2, RB3) greatly improves image quality, it works by supplying a modified 'opengl32.dll'
With RB2 and RB3, many players were not pleased with the memeified english translations. The community made a retranslation mod to resolve this.
These mods use a modified 'dinput8.dll' which allows loading modified versions of files from the '.pac' data files.
Linux Audio and Performance issues
Under Linux, Wine/Proton (A fork of Wine by Valve, the developer of Steam) is used to play Windows games. An unfortunate situation:
- Under Wine, sound effects do not work.
- Under Proton, the game has horrible stuttering.
Solving both issues requires using a further, community developed version of Proton called GE-Proton. For a period of time, Proton required Steam to run, but now there is a program called 'umu-launcher'
umu-launcher is a drop-in replacement for wine, which can automatically download the latest version of GE-Proton.
When loading Neptunia mods under Wine, the required dynamic link libraries are not loaded by default, this can be solved through 'winecfg' or an environment variable.
Additionally to all of this, there may be inexplainable performance issues with at least AMD GPUs. These require setting the environment variable: AMD_DEBUG=nowc
Steam version on Linux
The following fixes stuttering and sound effects, and allows mods to load if installed. You still need to apply the 4 GiB memory patch separately.
In Properties -> Compatibility:
- . Tick 'Force the use of a specific Steam Play compatibility tool', select 'GE-Proton'
In Properties -> General, set Launch option to:
WINEDLLOVERRIDES="dinput8,opengl32=n,b" AMD_DEBUG="nowc" %command%
GOG version Linux launch script for all Re;Birth games
Automatically enables 4 GiB patch, mod support, stutter and sound effect bug fixes. Requires 'umu-launcher' to use GE-Proton outside of Steam.
#!/bin/sh
# # Neptunia RB1-3 GOG version launch script. Last updated 2025 July.
# # Creates a wine prefix for Neptunia in the script directory under ./pfx
# # Applies 4 GiB patch if needed (and creates backup executable)
# # Requires `umu-launcher`, under Arch Linux: $ sudo pacman -Sy umu-launcher
SCRIPT_DIR="$(cd -- "$(dirname -- "${0}")" && pwd)"
patch4g(){
File="${1}"
if [ "MZ" != "$(head -c2 "${File}")" ]; then # DOS signature
echo "Could not recognize executable."
exit 1
fi
Bofs="$(("$(od -An -t u4 -N4 -j60 "${File}")" + 22))" # 374 or 384
Byte="$(od -An -t u1 -N1 -j "${Bofs}" "${File}")" # 0x02 unpatched
Mask="0x20" # Characteristics bit for >2 GiB memory support
if [ 0 = "$((Byte & Mask))" ]; then
cp -T --update=none "${File}" "${File}.bak"
perl -e "print chr($((Byte | Mask)))" \
| dd of="${File}" bs=1 seek="${Bofs}" conv=notrunc
echo "Patched: ${File}"
fi
}
case "${1}" in
1 ) PATH_EXE="${SCRIPT_DIR}/Hyperdimension Neptunia ReBirth1/NeptuniaReBirth1.exe" ;;
2 ) PATH_EXE="${SCRIPT_DIR}/Hyperdimension Neptunia ReBirth2/NeptuniaReBirth2.exe" ;;
3 ) PATH_EXE="${SCRIPT_DIR}/Hyperdimension Neptunia ReBirth3/NeptuniaReBirth3_NS.exe" ;;
* ) printf "%s\n" "Usage: ${0} NUMBER [ARGUMENTS]" "NUMBER can be 1, 2 or 3."; exit 1 ;;
esac
shift 1
(
if [ ! -f "${PATH_EXE}" ]; then
echo "${PATH_EXE}: No such file"
exit 2
fi
WORK_DIR="$(dirname -- "${PATH_EXE}")"
cd "${WORK_DIR}" || exit 2
patch4g "${PATH_EXE}"
# First setup of prefix with Wine instead of Proton links the My Documents dir
# This way your saves are stored in your home dir rather than in the prefix.
export WINEPREFIX="${SCRIPT_DIR}/pfx"
if [ ! -d "${WINEPREFIX}" ]; then
mkdir -p "${WINEPREFIX}"
wineboot -u
fi
# For latest GE-Proton, requires `umu-launcher`
export PROTONPATH="GE-Proton"
# For mod support, does nothing if mods are not installed
export WINEDLLOVERRIDES="dinput8,opengl32=n,b"
# Disable GTT write combining for AMD GPUs, requires `mesa` to do anything
# `export radeonsi_disable_sam=true` may also be necessary on some systems
export AMD_DEBUG="nowc"
umu-run "${PATH_EXE}" "${@}"
)
Camera Patch
Once popular forbidden art that allowed you to pan the camera however and zoom out infinitely.
All Re;Birth games use the same engine, and the compiled code ends up being very similar. These are the smallest possible snippets to find the unique instructions with a hex editor across most versions. All 3 instructions should be within ~100 bytes.
| Remove max camera distance |
|
| Remove camera angle clamp |
|
| Remove a call to a camera angle function |
|
Function calls vary not just by game but by revision and platform (Steam/GOG).
A Lua script to apply camera patch to any version of any Re;Birth game:
-- LUA patcher: Neptunia Re;Birth1, 2 & 3 remove camera limits
-- Probably place the script in same directory as the exe you want to patch
-- This is the only line you should change:
name = "NeptuniaReBirth3_NS.exe"
-- Don't edit below unless you know what you are doing
function fread(fp)
local file = io.open(fp, "rb")
if not file then error("Could not open file: " .. fp) end
local data = file:read("*a")
file:close()
return data
end
function fwrite(fp, data)
local file = io.open(fp, "wb")
if not file then error("Could not open file: " .. fp) end
file:write(data); file:flush(); file:close()
end
function to_char(s)
local a = {}
for h in string.gmatch(s, " *(%x%x) *") do
table.insert(a, string.char(tonumber(h,16)))
end
return table.concat(a, "")
end
function patch(data, list) -- list[1] = match; list[2] = patch
for _,p in ipairs(list) do
data = data:gsub(p[1], p[2], 1)
end
return data
end
function esc_ma(s) return to_char(s):gsub("%p", "%%%0") end
function esc_pa(s) return to_char(s):gsub("%%", "%%%%") end
local plist = {{ -- Remove max camera distance
esc_ma("C7804C01 00000000 803F F30F1080 5C010000"),
esc_pa("90909090 90909090 9090 F30F1080 5C010000"),
},{ -- Remove camera angle clamp
esc_ma("F30F1198 44010000"),
esc_pa("90909090 90909090"),
},{ -- Remove a call to a camera angle function
esc_ma("F30F1188 74010000") .. ".....", -- dots match any bytes
esc_pa("F30F1188 74010000 9090909090"),
}}
data = fread(name)
fwrite(name .. ".backup", data)
fwrite(name, patch(data, plist))