This is the real gunshot mod for Return to Castle Wolfenstein, created by Saxon, which has been fixed and updated by GlitchyJoe from ModDB. Here's what he had to say about this update:
Saxon's (all credit to him) mod was incorrectly made and not maintained. He must have used a 7zip file and renamed the extention to .pk3 from .7z This is incorrect. You must take an existing .pk3 file, empty it and then mod it's insides as you desire or simply rename a zip file to pk3.

About the Mod: Real weapon sounds pack for Return to Castle Wolfenstein. The audio in this pack replaces most of the default weapon sounds for RtCW, including the default reload sounds.
Weapon sounds included are: Colt 1911, FG42, M1 Carbine silenced Snooper Rifle, Luger P08, Mauser K98 (yeah I know, technically the in-game model is a Garand but whatever),  MG42, MP40, Silenced Sten, Thompson, Venom (sounds were pulled from an MG42, because this gun is fake)

I've also included some proper German voices which are unused sounds from Condition Zero. It's kind of nice to hear proper German in-game! Sadly I haven't been able to replace the scripted voices.

Please do not re-use these sounds without permission.

Installation: Just place the .pk3 file in the main folder of Return to Castle Wolfenstein.

Source: wolffiles.de | GlitchyJoe - moddb.com/realistic-sound-mod | Saxon - moddb.com/real-gunshots-pack-for-rtcw

	REALITIC GUNSHOT SOUND MOD Version:1.0  Saxon + GlitchyJoe  10.02.2018  4,357 MB  1143

RtCW Remake Mod Beta 1.0 by Grego & C.Z.R
The long-awaited beta release of Return to Castle Wolfenstein Remake Mod, created by Grzegorz Mirtyński & Cezary Szydlik, is finally here. This Mod utilises the creative improvements that can be achieved when using the new Berserker engine, thus giving this version of Return to Castle Wolfenstein a more modern appearance in regards to all aspects of the game, e.g., textures, lighting, gameplay.

+++ UPDATE +++
Wolfenstein4ever download (4,8 GB!!) is available now!

You have problem or question with the performance
please sent to forum: quakegate.ru

Source: moddb.com/rtcw-remake-mod | wolfflies.de

	RTCW REMAKE MOD - PART 1 OF 2 Version:Beta 1  Grego & C.Z.R  12.03.2015  2,8 GB  22322

	RTCW REMAKE MOD - PART 2 OF 2 Version:Beta 1  Grego & C.Z.R  12.03.2015  2 GB  18902

Another new update of Hellbaron's superb "Return to Castle Wolfenstein" modification, RtCW Venom 5.5 is now available for download.

Changelog:
# New textures and effects for both singleplayer and multiplayer.
# Some texture issues on weapons, walls and windows have now been fixed.
# Added the optional Thompson submachine gun model from E3 2001.
# Many other new improvements and optimisations.

Source: moddb.com/rtcw-venom-mod | ronboyproductions | wolffiles.de

	RTCW SP VENOM MOD Version:5.5  HEllBaron89  15.07.2018  550.93 MB  509

	RTCW SP VENOM MOD NVIDIA Version:5.5  HEllBaron89  15.07.2018  550.83 MB  442

This new mod for Return to Castle Wolfenstein is being created by GRECO and C.Z.R.. It's still in development, but excellent progress has been made already.

The Mod will include:
# New models (weapons, vehicles, peds etc.)
# New and better sounds
# New and more additions to the default maps
# New graphics options (bump map, parllax etc.)
# HD textures
# Gameplay improvements and much more

The RtCW Remake Mod Dev Team are currently looking for someone who knows how to make RTCW animations and edit maps with scripts. They are also looking for a coder/programmer. If you have such skills, or know someone who does and would be interested in joining the new project, then please contact the team via the links below.

RtCW Remake Mod on Facebook

Source: wolffiles.de | MOD-DB

Return to Castle Wolfenstein Singleplayer CoOp 0.9.3 - The list looks small, but the amount of change code is huge. I hope this makes it more stable than before, have fun!

Download the files. Extract them somewhere (NOT in the rtcw folder). Copy the RTCW pk3's (mp, sp and pak0) into the rtcwcoop main folder and start the rtcwcoop executable.

New features:
- Total new client/server network code, its a straight port from rtcwmp which is proven to be a lot more stable than what we currently had
- Working pk3 autodownloading, thanks to the rtcwmp client server code
- Knife throwing (yay!)
- New sound code
- added a new alias for the mp_quickmessage cmd: voicechat

Fixes:
- 'attempts' in end level stats now shows the number of deaths of all players
- if no more lives left wait a few seconds before restarting the map
- new votesounds
- tomb and escape1 one have fixed mapscripts, bugs should be gone
- cvar security fixes, same for autodownload exploits

Return to Castle Wolfenstein Singleplayer CoOp 0.9.3 - Die Änderungsliste sieht zwar klein aus, aber das Ausmaß an Codeänderungen ist sehr groß. Ich hoffe, das macht es stabiler als zuvor. Viel Spaß!

Downloade die Dateien. Entpacke es irgendwo hin (NICHT in den RTCW Ordner). Kopiere deine RTCW-pk3´s (mp, sp und pak0) in den rtcwcoop Hauptordner und starte die rtcwcoop.exe

Quelle: Thx to =KT=555 via Shoutbox

This is Hellbaron's releaese of his superb "Return to Castle Wolfenstein - Venom Mod Version 5.4" 2018

Changes:
Fixed the fonts for "Return to Castle Wolfenstein" multiplayer.
Fixed some more textures.
Added a new shield effect for both singleplayer and multiplayer.

Venom mod 5.4, includes:
Full compatibility with Rtcw 1.41, Knightmare and ioRTCW engines.
More optimizations, better effects on weapons.
Revisited AI and cutscenes of levels.
Lens effect on 3d binocular model.
Added 3rd person model fg42 from Wolfenstein ET.
Ported pre-release thompson gun model (from E3 2001).
Better textures for helmets.
Added specular for blood decals.
New HD textures for MP/SP mode.
New effects for flamethrower, candles, fire and torches ( and human torches..).

Source: moddb.com/rtcw-venom-mod | ronboyproductions | wolffiles.de

	RTCW SP VENOM MOD 2018 Version:5.4  HEllBaron89  11.03.2018  560.83 MB  974

	RTCW SP VENOM MOD - NVIDIA BUILD Version:5.4  HEllBaron89  05.02.2018  554.84 MB  395

New Version of RealRTCW Realism Mod Released - Version 2.0 + Optional HD Pack!

Hello everyone. I'm proud to announce that WolfETPlayer has released a new version of his RealRTCW Realism Mod today - version 2.0! Also, he has released an optional HD pack which combines textures from some other HD texture mods for Rtcw. You can download both releases below.
I would like to thank WolfETPlayer for his amazing work thus far.

Source: moddb.com/realrtcw-realism-mod-2.0 | ronboyproductions

	REAL RTCW REALISM MOD Version:2.0  Ronboy and WolfETPlayer  19.08.2016  70,918 MB  1271

	RTCW HD TEXTURE PACK  WolfETPlayer  19.08.2016  505 MB  3816

WolfETPlayer has now released the latest version of his superb rebuild of Return to Castle Wolfenstein singleplayer, RealRtCW 2.1. with  3 RtCW SP-addons on board too.

This new version of the mod is now running on the remarkable ioRTCW engine with included widescreen support, sound improvements, bug/crash fixes, and much more.
RealRtCW players who are using "vsync" can now utilise this hotfix, created by MAN-AT-ARMS.

The 3 Return to Castle Wolfenstein SP missions available for now are:
# RealRtCW Capuzzo
# RealRtCW Timegate
# RealRtCW Stalingrad

The main changes are:
    ioRTCW engine (widescreen support, better sounds etc.)
    New weapons. New models for the old weapons
    Total sound overhaul
    Custom maps support
    Balance changes and more! Check out the "readme" file for the full changelog

Installation instructions:
1) Choose either the x64 or x86 executables folder (depending on which version of RealRtCW you're using. 32bit = x86, 64bit = x64)
2) Copy everything from your chosen folder and place this into your RtCW root folder, replacing the old files.

Source: moddb.com/realrtcw | ronboyproductions | wolffiles.de

	REALRTCW + HD-PACK + HOTFIX Version:2.1  WolfETPlayer  10.06.2017  1,06 GB  1339

	REALRTCW CAPUZZO  WolfETPlayer  10.06.2017  48,95 MB  753

	REALRTCW TIMEGATE  WolfETPlayer  10.06.2017  96.11 MB  826

	REALRTCW STALINGRAD  WolfETPlayer  10.06.2017  295 MB  1926

Return to Castle Wolfenstein Singleplayer Venom Mod 2.0 by HEllBaron89

Born for be a compilation of the best stuff for Return to Castle Wolfenstein in first release, this mod improve graphic, gameplay and AI of enemies with all possibility of the old Id Tech 3, keeping the original game elements.

Mod 2.0 include:
    widescreen patch 1.42 by Knightmare.
    better skins for 90% NPCs.
    new skins for all weapons, by OSJC and AidenDemon.
    Improved shader effects for weapons, Npcs and environment.
    new mg42 model (ported from Wolfenstein: ET).
    Revisited and correct AI system.
    HD crosshairs and icons.
    upscaled original textures and HD textures from Eugeny pack 0.4 modified.

Installation:
Copy all the content of the package like it's on your RTCW installation folder. The cfg. file is facoltative, but increase the graphic quality to max possible for the engine. (is necessary the game patched to 1.41 to apply the wide patch and extreme quality cfg file!!)

Source: moddb.com/rtcw-venom | etpro.de | HEllBaron89

	RTCW SP VENOM MOD (HD TEXTURES) Version:2.0  HEllBaron89  08.03.2015  192.74 MB  451

RtCW Cooperative - Timegate v2

Yo$hik has updated his release of "RtCW Timegate" for the "Return to Castle Wolfenstein Cooperative" mod, which fixes many of the bugs found in the original version.

Changelog:
- The level of "labor2" has undergone decompilation and subsequent rebuild and optimization. The reason is that the number of entiny-objects exceeded the limit of the cooperative engine, which led to the drop of dedicated servers.
- The train on "ber" now passes the entire railway, from the beginning to the end.
- A new room and secret have been added to the  "vil01" map.
- Also added, "some little thing xD"

Source: wolffiles.de | Yo$hik on Youtube: youtube.com/Yo$hik

	COOP TIMEGATE Version:2.0  Priv, Pbald  05.08.2018  120.71 MB  896