Old friends. Familiar games. A way back online.
We’re rebuilding the Sierra Internet Gaming System so classic multiplayer can find its next match. Welcome to SIGSWON.
Community-run revival Outpost 2 fully supported
Install the SIGSWON client DLLs for your existing Outpost 2 + OPU game. The lobby and gameplay relay are built in.
You’ll need Outpost 2 and the OPU community patch.
Our Windows installer adds the two SIGSWON DLLs and backs up any existing copies. The lobby and relay are built in. Server connections use verified TLS; a lock and “Secure connection” appear in the status bar while protected. This release adds a host join-request sound and a taskbar flash when an approval request needs your attention. Custom sounds, updater progress, and the earlier fixes are included.
Download Windows installerExisting Outpost 2 + OPU installation required. Unsigned installer; Windows may show an unknown-publisher notice.
Close the game and its launcher before running setup.
Run setup, approve the administrator prompt, and select Outpost2.exe in the base game folder. Confirm and wait for the success message.
Launch your existing OPU/OPULauncher.exe, choose online multiplayer, and sign in or create a SIGSWON account.
Game owners now hear an alert when a join request needs approval, with sound effects enabled in Preferences > General. The taskbar also flashes while the application is in the background, even if sounds are off. Autojoin and filtered requests do not trigger approval alerts.
Read the release notes. Acceptance of sound playback, visible taskbar flashing and the new updater on Windows XP is still pending.
For a new installation, install Outpost 2, then the full OPU 1.4.1 update, then SIGSWON. If you already use OPU 1.4.0, choose the incremental 1.4.1 update on the OPU download page. The game and OPU are not included in the SIGSWON installer.
Extract the manual ZIP, back up any existing sierranw.dll and snwvalid.dll, then copy both new DLLs into the base game folder. Leave the OPU folder unchanged.
Setup keeps previous DLLs inside a new .sigswon-update-* folder in the game directory. Keep the backup until you have tested the game. To restore it, close the game and follow the recovery guide. Locked or read-only files stop setup; detected replacement failures are rolled back.
The installer has no Windows publisher certificate. The embedded update payload is separately signature-verified; this does not remove Windows’ unknown-publisher notice. Outpost 2 multiplayer is fully supported and working. Civil War Generals 2 and Cyberstorm 2 are supported. Birthright and Lords of Magic are in testing. TLS protects server TCP connections; gameplay UDP traffic is not encrypted.
Outpost 2, Civil War Generals 2, and Cyberstorm 2 are supported. Birthright and Lords of Magic are in testing as we bring more classic games back online.
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ORIGINAL CLIENT ARTWORK / 1997
Return to the colony. Find other players through the SIGS lobby and connect through the gameplay relay.
Fully supported and working with SIGSWON. Meet in the lobby and play through the built-in gameplay relay.
Check the networkThe familiar lobby, room browser, and game setup, captured from the v5 client. Select a screenshot to see it at full size.
Find players, browse rooms, and chat before a match.
Pick a gathering place and join the conversation.
Name your match and choose player and connection limits.
Lobby screenshot supplied by a community member; room chooser and game setup use demonstration data. Player counts in these images are not live.
When the original SIGS service went dark, its games lost their meeting place. SIGSWON rebuilds the hub and relay that bring players together.
The network speaks the original SIGS protocol, reconnecting compatible clients to a rebuilt service.
The hub tracks players, open listings, and started games. Meet in the lobby and get a game together.
See how the original game and replacement DLL connect through the UDP relay.
How gameplay connects