Creating a multiplayer mod for Prototype is not like modding Skyrim or Minecraft . Radical Entertainment built Prototype on a heavily modified in-house engine (the "Titanium" engine). It was never architected for network synchronization. In fact, the codebase is famously hostile.
: On platforms like Reddit and Discord, users frequently share progress on beta-stage mods that attempt to bring co-op to Prototype 2 . Key Features of Multiplayer Prototypes