Directly accessing official Ubisoft matchmaking or inviting friends through the standard in-game menu is generally with a standard crack. Official multiplayer requires a valid account and connection to Ubisoft's infrastructure, which most cracks bypass or disable to allow the game to run. However, the community has developed workarounds:
Download a specific "multiplayer fix" on top of the cracked game. anno 1800 cracked multiplayer
"You have the device, Captain," Crane said. He did not smile. "The province has offered the wage. Considerable." anno 1800 cracked multiplayer