A modder has found a way to activate split-screen co-op in Halo: Campaign Evolved on PC, unlocking a feature that appears to already exist within the game's code but is switched off by default. The discovery highlights how console-oriented functionality can sometimes be dormant in PC ports rather than genuinely absent, giving players a way to enjoy local multiplayer that the official release doesn't currently offer.

The mod reportedly enables the split-screen mode by activating code already present in the PC version of the game, rather than building the feature from scratch, suggesting developer 343 Industries (or whichever studio handled the port) left the functionality in place but inactive. Details on installation, stability and whether the feature will be officially supported remain limited, and it is unclear if the developers plan to enable split-screen properly in a future update.