Ck3 Lan Multiplayer ((exclusive)) «2027»

CK3 is CPU-bound. The host computer (the one running the save file) needs a strong single-core performance. Intel i7/i9 or AMD Ryzen 7/9 (5000 series or newer) is ideal.

While there isn't a "LAN" button, you can effectively play with someone on your local network using the standard multiplayer interface: ck3 lan multiplayer

: Joining a late-game session can take 10–15 minutes as the large save file transfers to clients, even on LAN. Be patient during the "Downloading Save" phase. Multiplayer Performance Tips CPU is King CK3 is CPU-bound

While you can host a "LAN party," the technical setup is functionally identical to playing online. Server Routing Crusader Kings II ck3 lan multiplayer