Only 10 years ago I had two people over to LAN game. Newly released Far Cry 3 had some co-op bits in it! Didn't work. Despite each machine being on the same ne

Only 10 years ago I had two people over to LAN game. Newly released Far Cry 3 had some co-op bits in it! Didn't work. Despite each machine being on the same network they tried to connect via the routers external IP and failed at the UPnP/NAT traversal stage. Honestly, a "direct connect" option solves many things.