Split-screen on PC

Day of Defeat: Source

Up to 5 players on one PC, with controllers or keyboard and mouse.

5Verified handler

Handler “Day of Defeat Source” by Snailedlt, version 1

P4+1 more players

What works

With Nucleus Co-op, up to 5 players can play Day of Defeat: Source together on one PC, each in their own part of the screen, with controllers or keyboard and mouse. The free community handler “Day of Defeat Source” by Snailedlt does the setup and was checked by hub moderators: version 1, updated 22 Apr 2020. Day of Defeat: Source is a shooter game from 2005.

Players5
ControllersSupported
Keyboard and mouseSupported
Several keyboards and miceNot supported
Hub moderatorsVerified

How to play Day of Defeat: Source split screen on PC

Get Nucleus Co-op
Download Nucleus Co-op, free for Windows 10 and 11, and unzip it into its own folder, for example C:\NucleusCo-op. There is no installer.
Keep it out of Program Files, your user folder and OneDrive.
Download Nucleus Co-op
Install the Day of Defeat: Source handler
In Nucleus Co-op, search the Hub for Day of Defeat: Source and install its handler, or download the handler file from this page and drop it on the Nucleus window. Then show Nucleus where Day of Defeat: Source is installed.
Download the handler file (.nc)
Take a seat
Each player presses a button on their own controller to join and takes a spot on the screen. Pick a layout that fits your players.
Launch and connect
Press Launch: Nucleus opens one copy of Day of Defeat: Source per player and lays the windows out on your screen. Then link them in game, usually one player hosts a LAN or online session and the others join it. The handler notes say how.

What you need

A Windows 10 or 11 PC
Nucleus Co-op runs on Windows only. System requirements
Day of Defeat: Source for Windows
Installed on that PC. Nucleus starts every player's window from that one install.
Nucleus Co-op, free
With .NET Framework 4.7.2 or later and the Visual C++ 2015–2022 runtimes (x86 and x64). Download
Something to play with
One controller per player; one player can use the keyboard and mouse. Controllers
A PC that can run 5 copies
Each player runs their own copy of Day of Defeat: Source, so the PC carries several times the usual load. Lower the graphics settings if it struggles. Performance tips
A multiplayer mode
Nucleus links the windows through the game's own LAN or online mode; the handler takes care of it.

Handler notes

How to play splitscreen: Start a server on the first instance. Start the next instance when you are in-game. Click on the last Nucleus prompt when all instances are set. If you use the keyboard click/alt-tab on the corresponding keyboard-player instance.

Authors and Contributors of this handler: Snailed lt from the Split Screen Dreams Discord

About Day of Defeat: Source

Set in the European theater of operations during World War II, DoD players choose a specific role on their team, and tackle goal-oriented missions based on historical operations. DoD:Source takes the classic gameplay of the original Day of Defeat and improves the experience with updated or redesigned maps, weapons, and characters, along with Source engine gameplay and technical innovations, including state of the art graphics and HDR lighting. Try DoD:Source and we think you'll agree it's the most fun WWII action available online.

Summary from IGDB