Lobby Management

This page covers creating, joining, leaving, and inviting players to Steam lobbies using SteamNetworkClient.

Quick start

SteamNetworkClient client = new SteamNetworkClient();
client.Initialize();

// Create a friends-only lobby with up to 8 members
LobbyInfo lobby = await client.CreateLobbyAsync(ELobbyType.k_ELobbyTypeFriendsOnly, 8);

// Join an existing lobby
await client.JoinLobbyAsync(lobbyId);

// Leave the current lobby
client.LeaveLobby();

// Read current members
List<MemberInfo> members = client.GetLobbyMembers();

// Invite a friend or open Steam overlay invite
client.InviteFriend(friendId);
client.OpenInviteDialog();

Events

Subscribe to lobby lifecycle and membership changes:

client.OnLobbyCreated += (s, e) =>
{
    MelonLogger.Msg($"Lobby created: {e.Lobby.LobbyId}");
};

client.OnLobbyJoined += (s, e) =>
{
    MelonLogger.Msg($"Joined lobby: {e.Lobby.LobbyId}");
};

client.OnLobbyLeft += (s, e) =>
{
    MelonLogger.Msg($"Left lobby {e.LobbyId}: {e.Reason}");
};

client.OnMemberJoined += (s, e) =>
{
    MelonLogger.Msg($"Member joined: {e.Member.DisplayName}");
};

client.OnMemberLeft += (s, e) =>
{
    MelonLogger.Msg($"Member left: {e.Member.DisplayName}");
};

Event args reference:

• LobbyCreatedEventArgs
• LobbyJoinedEventArgs
• LobbyLeftEventArgs
• MemberJoinedEventArgs
• MemberLeftEventArgs

Tips

• Only the lobby owner can change lobby-wide data; see Data Synchronization.
• Check client.IsInLobby and client.IsHost for state-aware UI and commands.
• Use Steam overlay invites for the smoothest UX: client.OpenInviteDialog().