AWS SDK Version 3 for .NET
API Reference

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Reserves open slots in a game session for a group of players. New player sessions can be created in any game session with an open slot that is in ACTIVE status and has a player creation policy of ACCEPT_ALL. To add a single player to a game session, use CreatePlayerSession

To create player sessions, specify a game session ID and a list of player IDs. Optionally, provide a set of player data for each player ID.

If successful, a slot is reserved in the game session for each player, and new PlayerSession objects are returned with player session IDs. Each player references their player session ID when sending a connection request to the game session, and the game server can use it to validate the player reservation with the GameLift service. Player sessions cannot be updated.

The maximum number of players per game session is 200. It is not adjustable.

Related actions

All APIs by task


This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginCreatePlayerSessions and EndCreatePlayerSessions.

Namespace: Amazon.GameLift
Assembly: AWSSDK.GameLift.dll
Version: 3.x.y.z


public abstract Task<CreatePlayerSessionsResponse> CreatePlayerSessionsAsync(
         String gameSessionId,
         List<String> playerIds,
         CancellationToken cancellationToken
Type: System.String

A unique identifier for the game session to add players to.

Type: System.Collections.Generic.List<System.String>

List of unique identifiers for the players to be added.

Type: System.Threading.CancellationToken

A cancellation token that can be used by other objects or threads to receive notice of cancellation.

Return Value
The response from the CreatePlayerSessions service method, as returned by GameLift.


GameSessionFullException The game instance is currently full and cannot allow the requested player(s) to join. Clients can retry such requests immediately or after a waiting period.
InternalServiceException The service encountered an unrecoverable internal failure while processing the request. Clients can retry such requests immediately or after a waiting period.
InvalidGameSessionStatusException The requested operation would cause a conflict with the current state of a resource associated with the request and/or the game instance. Resolve the conflict before retrying.
InvalidRequestException One or more parameter values in the request are invalid. Correct the invalid parameter values before retrying.
NotFoundException THe requested resources was not found. The resource was either not created yet or deleted.
TerminalRoutingStrategyException The service is unable to resolve the routing for a particular alias because it has a terminal RoutingStrategy associated with it. The message returned in this exception is the message defined in the routing strategy itself. Such requests should only be retried if the routing strategy for the specified alias is modified.
UnauthorizedException The client failed authentication. Clients should not retry such requests.

Version Information

.NET Core App:
Supported in: 3.1

.NET Standard:
Supported in: 2.0

.NET Framework:
Supported in: 4.5

See Also