Are you Windows 10 user?

Alternatively you can right-click on file and choose "Run as Admin", to avoid UAC prompt.

Windows 7, although that seemed to fix it and the prompt ran properly. Thanks.

You said way back up the top that all this patching isn't necessary for Direct IP with friends. So should I just read up on port forwarding if I want to do that?

The patch (or GitHub instruction) is intended to replace Gamespy Master Server in Clients.

About Servers, I fixed the CD key problem when you run it in Internet mode.

Anyway, the functionality of alternative gamespy masterlist is still restricted.

So you need add your server IP / Join Port / GS2 Query Port (JoinPort+3) in Gametracker.com, in order to turn your server public.

Either LAN / Internet, port fwd is necessary. The only difference is that without a server listed, you will need to share IP with your friends to join using Direct IP.

A little out of the title, but I have always wanted somebody to patch some of these:

GAME DESIGNER MISTAKES

CONTRADICTION: Single player and multiplayer co-op have different scoring. In single player all SWAT officers except the leader can be injured and still you can get 100/100 score. In multiplayer no SWAT officer must be injured to get 100/100 score.
NON-REALISTIC: SWAT officer will be injured if another SWAT officer hits him with a fist. This lazy looking left handed pounch to center body area should never result an injury to a armored SWAT officer.
CONTRADICTION: Less Lethal Shotgun hit to SWAT officer results permanent red mark on body icon on bottom left, but keeps SWAT officer status healthy
CONTRADICTION: Launcher grenade hit to SWAT officer will result nothing on the body icon on bottom left, but changes SWAT officer status injured
BAD IDEA: Vote for leader function should not be used because leader status prevents everyone seeing when leaders status is injured
BAD IDEA: Heavy armor and light armor are useless if you want to have 100/100 scores in multiplayer because after even a small hit results injury
MISSING FEATURE: Hand grenades have no counter indicating how many you have got.

BUGS
Flashlight can be pointed through walls to help optiwanding.
Suspects and civilians may be visible partly trough doors and when surrendered they sometimes may be pushed inside some objects for example a television or a suitcase.
Used bullets are sometimes stuck in air.
In DuPlexis Diamond Center you may walk in air if you choose to go down in certain angle with the left handrail of top floor main stairs.
In -EXP-Department Of Agriculture you can drop behind fallen chair and be stuck forever.
In -EXP- Fresnal St. Station a handcuffed suspect managed to free himself and stand up.
In single player dropped weapons can drop inside graphics and become invisible, they still have to be picked up for maximum score, so all you can do is to move cursor around the surrendered suspects to find text Secure Evidence
In multiplayer clients may see dropped weapons that the host does not see and vice versa. Usually game will leave out weapons that not everyone can secure as the mission progresses.

I prefer the "Swat 4 Server Browser Alternative" myself (I run the disk version of gold edition) but I guess this would work as well.

Good work.

Dunno if it's been mentioned elsewhere but http://aluigi.altervista.org/patches/swat4x2fix.lpatch might also be a good idea.

Im still getting Invalid CdKey when trying to host an internet server even after running the patch.bat.

Ran it as administrator

Be sure that your installation folder is C:\Program Files (x86)\GOG Galaxy\Games\SWAT 4\, otherwise, you are free to right-click script file, and edit it according your custom installation path.

The goal of patch is allow client to experience once again browsing Gamespy in game Master server list.

The addition of the known as "Public Server Patch" was made supposedly that i would be a dedicated server.

Unfortunately, it seems not work to Listening Mode game host; therefore, I recommend host the game as dedicated server, and then relaunch the game connecting in localhost - IP 127.0.0.1.

Note that you need to forward UDP & TCP ports ranging 10480-10487 (104890 if you want to use Gez WebAdmin)

You can also just add you internal LAN IP in DMZ (demilitarized zone) in your router, instead port forward.

Note that host a game in internet as "LAN" wont present such CDkey issue, since your friends use direct IP connection.

Stay tuned because there are new 'ALL-in-ONE' package to be launched asap intended to replace all those several pieces still needed to announce your public server in masterserver and others.

Best regards.

I just added 2 more possible paths.

I'm a bit busy with paperwork right now, but I will add path detection searching windows registry asap

---------------------------

Here's the direct download to Masterserver Patch + Public Server Patch:

Swat 4 v1.1: Engine.dll

Expansion: Engine.dll

P.S.

I bought my game in D2D. Since gamespy shutdown I could not reinstall it anymore; even still having serial number.

So I replaced the original Swat4.exe and Swat4x.exe, which tried to contact D2D's dead servers, in order to allow me to launch the game, for those files:

Swat 4 v1.1: Swat4.exe

Expansion: Swat4X.exe

I don't know if that it will somehow help, but I don't have such problems related with "CD key".

and now I am getting an error when connecting with my friend of cd-key auth failed when we both try to join the same server with this patch. Freaking wierd. Running the expansion.

https://github.com/sergeii/swat-patches/tree/master-for-servers/swat4stats-masterserver#hosting-a-server

This fix does not work for hosting a SWAT 4x server using the GoG version. Whenever a player tries to connect the dedicated server crashes with this error: Another user supposedly created a fix for this but they never added links to their thread.

By far the best way to fix the multiplayer server list is to get the Content/System patch for the SWAT4: Gold Edition on https://github.com/sergeii/swat-patches/tree/master/swat4stats-masterserver#how-to-install-this-patch. You simply replace the Engine.dll file, run the game and viola!

My Swat4X dedicated server crashes upon connection as mentioned above. Does anyone know how to fix that?
Did you ever find a fix for this? i'm having the same problem