Ensure your local router can handle multiple simultaneous connections to Steam. Even a slow "mobile hotspot" connection might work for the initial handshake, but a stable line is preferred.
Relic Entertainment and Sega, however, chose a different path for Company of Heroes 2 . The game was built around Steam’s infrastructure. Every multiplayer match, regardless of whether you are playing with a friend sitting next to you, is routed through Steam servers. company of heroes 2 lan
: Every participant must own a separate copy of the game; you cannot use Steam Family Sharing to play together simultaneously. Ensure your local router can handle multiple simultaneous
Even though the data passes through Steam's servers, you can still organize local matches that feel like a LAN environment by following these steps: The game was built around Steam’s infrastructure
Getting ready for COH2 multiplayer, any tips? : r/CompanyOfHeroes
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