CreatePlayerSessions - Amazon GameLift
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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 Amazon 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

Request Syntax

{ "GameSessionId": "string", "PlayerDataMap": { "string" : "string" }, "PlayerIds": [ "string" ] }

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.


In the following list, the required parameters are described first.


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

Type: String

Length Constraints: Minimum length of 1. Maximum length of 256.

Pattern: [a-zA-Z0-9:/-]+

Required: Yes


List of unique identifiers for the players to be added.

Type: Array of strings

Array Members: Minimum number of 1 item. Maximum number of 25 items.

Length Constraints: Minimum length of 1. Maximum length of 1024.

Required: Yes


Map of string pairs, each specifying a player ID and a set of developer-defined information related to the player. Amazon GameLift does not use this data, so it can be formatted as needed for use in the game. Any player data strings for player IDs that are not included in the PlayerIds parameter are ignored.

Type: String to string map

Key Length Constraints: Minimum length of 1. Maximum length of 1024.

Value Length Constraints: Minimum length of 1. Maximum length of 2048.

Required: No

Response Syntax

{ "PlayerSessions": [ { "CreationTime": number, "DnsName": "string", "FleetArn": "string", "FleetId": "string", "GameSessionId": "string", "IpAddress": "string", "PlayerData": "string", "PlayerId": "string", "PlayerSessionId": "string", "Port": number, "Status": "string", "TerminationTime": number } ] }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


A collection of player session objects created for the added players.

Type: Array of PlayerSession objects


For information about the errors that are common to all actions, see Common Errors.


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.

HTTP Status Code: 400


The service encountered an unrecoverable internal failure while processing the request. Clients can retry such requests immediately or after a waiting period.

HTTP Status Code: 500


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.

HTTP Status Code: 400


One or more parameter values in the request are invalid. Correct the invalid parameter values before retrying.

HTTP Status Code: 400


THe requested resources was not found. The resource was either not created yet or deleted.

HTTP Status Code: 400


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.

HTTP Status Code: 400


The client failed authentication. Clients should not retry such requests.

HTTP Status Code: 400

See Also

For more information about using this API in one of the language-specific Amazon SDKs, see the following: