gcsystemmsgs.proto

Protobufs / gcsystemmsgs.proto

CS2 build 25218825 · Steam date 2026-09-09 · platform windows-x86_64 · schema format 2.2

Group: GC and Steam SDKMessages: 13 top-level, 14 totalEnums: 6 top-level, 6 total

Imports: none

Enums

EGCSystemMsg

EGC System Msg EGCSystem SystemMsg k_EGCMsgInvalid k_EGCMsgMulti k_EGCMsgGenericReply k_EGCMsgSystemBase k_EGCMsgAchievementAwarded k_EGCMsgConCommand k_EGCMsgStartPlaying k_EGCMsgStopPlaying k_EGCMsgStartGameserver k_EGCMsgStopGameserver k_EGCMsgWGRequest k_EGCMsgWGResponse k_EGCMsgGetUserGameStatsSchema k_EGCMsgGetUserGameStatsSchemaResponse k_EGCMsgGetUserStatsDEPRECATED k_EGCMsgGetUserStatsResponse k_EGCMsgAppInfoUpdated k_EGCMsgValidateSession k_EGCMsgValidateSessionResponse k_EGCMsgLookupAccountFromInput k_EGCMsgSendHTTPRequest k_EGCMsgSendHTTPRequestResponse k_EGCMsgPreTestSetup k_EGCMsgRecordSupportAction k_EGCMsgGetAccountDetails_DEPRECATED k_EGCMsgReceiveInterAppMessage k_EGCMsgFindAccounts k_EGCMsgPostAlert k_EGCMsgGetLicenses k_EGCMsgGetUserStats k_EGCMsgGetCommands k_EGCMsgGetCommandsResponse k_EGCMsgAddFreeLicense k_EGCMsgAddFreeLicenseResponse k_EGCMsgGetIPLocation k_EGCMsgGetIPLocationResponse k_EGCMsgSystemStatsSchema k_EGCMsgGetSystemStats k_EGCMsgGetSystemStatsResponse k_EGCMsgSendEmail k_EGCMsgSendEmailResponse k_EGCMsgGetEmailTemplate k_EGCMsgGetEmailTemplateResponse k_EGCMsgGrantGuestPass k_EGCMsgGrantGuestPassResponse k_EGCMsgGetAccountDetails k_EGCMsgGetAccountDetailsResponse k_EGCMsgGetPersonaNames k_EGCMsgGetPersonaNamesResponse k_EGCMsgMultiplexMsg k_EGCMsgMultiplexMsgResponse k_EGCMsgWebAPIRegisterInterfaces k_EGCMsgWebAPIJobRequest k_EGCMsgWebAPIJobRequestHttpResponse k_EGCMsgWebAPIJobRequestForwardResponse k_EGCMsgMemCachedGet k_EGCMsgMemCachedGetResponse k_EGCMsgMemCachedSet k_EGCMsgMemCachedDelete k_EGCMsgMemCachedStats k_EGCMsgMemCachedStatsResponse k_EGCMsgMasterSetDirectory k_EGCMsgMasterSetDirectoryResponse k_EGCMsgMasterSetWebAPIRouting k_EGCMsgMasterSetWebAPIRoutingResponse k_EGCMsgMasterSetClientMsgRouting k_EGCMsgMasterSetClientMsgRoutingResponse k_EGCMsgSetOptions k_EGCMsgSetOptionsResponse k_EGCMsgSystemBase2 k_EGCMsgGetPurchaseTrustStatus k_EGCMsgGetPurchaseTrustStatusResponse k_EGCMsgUpdateSession k_EGCMsgGCAccountVacStatusChange k_EGCMsgCheckFriendship k_EGCMsgCheckFriendshipResponse k_EGCMsgGetPartnerAccountLink k_EGCMsgGetPartnerAccountLinkResponse k_EGCMsgDPPartnerMicroTxns k_EGCMsgDPPartnerMicroTxnsResponse k_EGCMsgVacVerificationChange k_EGCMsgAccountPhoneNumberChange k_EGCMsgInviteUserToLobby k_EGCMsgGetGamePersonalDataCategoriesRequest k_EGCMsgGetGamePersonalDataCategoriesResponse k_EGCMsgGetGamePersonalDataEntriesRequest k_EGCMsgGetGamePersonalDataEntriesResponse k_EGCMsgTerminateGamePersonalDataEntriesRequest k_EGCMsgTerminateGamePersonalDataEntriesResponse k_EGCMsgRecurringSubscriptionStatusChange k_EGCMsgDirectServiceMethod k_EGCMsgDirectServiceMethodResponse

Schema entity: EGCSystemMsg

Name	Number	Message
k_EGCMsgInvalid	0
k_EGCMsgMulti	1
k_EGCMsgGenericReply	10
k_EGCMsgSystemBase	50
k_EGCMsgAchievementAwarded	51
k_EGCMsgConCommand	52
k_EGCMsgStartPlaying	53
k_EGCMsgStopPlaying	54
k_EGCMsgStartGameserver	55
k_EGCMsgStopGameserver	56
k_EGCMsgWGRequest	57
k_EGCMsgWGResponse	58
k_EGCMsgGetUserGameStatsSchema	59
k_EGCMsgGetUserGameStatsSchemaResponse	60
k_EGCMsgGetUserStatsDEPRECATED	61
k_EGCMsgGetUserStatsResponse	62
k_EGCMsgAppInfoUpdated	63
k_EGCMsgValidateSession	64
k_EGCMsgValidateSessionResponse	65
k_EGCMsgLookupAccountFromInput	66
k_EGCMsgSendHTTPRequest	67
k_EGCMsgSendHTTPRequestResponse	68
k_EGCMsgPreTestSetup	69
k_EGCMsgRecordSupportAction	70
k_EGCMsgGetAccountDetails_DEPRECATED	71
k_EGCMsgReceiveInterAppMessage	73
k_EGCMsgFindAccounts	74
k_EGCMsgPostAlert	75
k_EGCMsgGetLicenses	76
k_EGCMsgGetUserStats	77
k_EGCMsgGetCommands	78
k_EGCMsgGetCommandsResponse	79
k_EGCMsgAddFreeLicense	80
k_EGCMsgAddFreeLicenseResponse	81
k_EGCMsgGetIPLocation	82
k_EGCMsgGetIPLocationResponse	83
k_EGCMsgSystemStatsSchema	84
k_EGCMsgGetSystemStats	85
k_EGCMsgGetSystemStatsResponse	86
k_EGCMsgSendEmail	87
k_EGCMsgSendEmailResponse	88
k_EGCMsgGetEmailTemplate	89
k_EGCMsgGetEmailTemplateResponse	90
k_EGCMsgGrantGuestPass	91
k_EGCMsgGrantGuestPassResponse	92
k_EGCMsgGetAccountDetails	93
k_EGCMsgGetAccountDetailsResponse	94
k_EGCMsgGetPersonaNames	95
k_EGCMsgGetPersonaNamesResponse	96
k_EGCMsgMultiplexMsg	97
k_EGCMsgMultiplexMsgResponse	98
k_EGCMsgWebAPIRegisterInterfaces	101
k_EGCMsgWebAPIJobRequest	102
k_EGCMsgWebAPIJobRequestHttpResponse	104
k_EGCMsgWebAPIJobRequestForwardResponse	105
k_EGCMsgMemCachedGet	200
k_EGCMsgMemCachedGetResponse	201
k_EGCMsgMemCachedSet	202
k_EGCMsgMemCachedDelete	203
k_EGCMsgMemCachedStats	204
k_EGCMsgMemCachedStatsResponse	205
k_EGCMsgMasterSetDirectory	220
k_EGCMsgMasterSetDirectoryResponse	221
k_EGCMsgMasterSetWebAPIRouting	222
k_EGCMsgMasterSetWebAPIRoutingResponse	223
k_EGCMsgMasterSetClientMsgRouting	224
k_EGCMsgMasterSetClientMsgRoutingResponse	225
k_EGCMsgSetOptions	226
k_EGCMsgSetOptionsResponse	227
k_EGCMsgSystemBase2	500
k_EGCMsgGetPurchaseTrustStatus	501
k_EGCMsgGetPurchaseTrustStatusResponse	502
k_EGCMsgUpdateSession	503
k_EGCMsgGCAccountVacStatusChange	504
k_EGCMsgCheckFriendship	505
k_EGCMsgCheckFriendshipResponse	506
k_EGCMsgGetPartnerAccountLink	507
k_EGCMsgGetPartnerAccountLinkResponse	508
k_EGCMsgDPPartnerMicroTxns	512
k_EGCMsgDPPartnerMicroTxnsResponse	513
k_EGCMsgVacVerificationChange	518
k_EGCMsgAccountPhoneNumberChange	519
k_EGCMsgInviteUserToLobby	523
k_EGCMsgGetGamePersonalDataCategoriesRequest	524
k_EGCMsgGetGamePersonalDataCategoriesResponse	525
k_EGCMsgGetGamePersonalDataEntriesRequest	526
k_EGCMsgGetGamePersonalDataEntriesResponse	527
k_EGCMsgTerminateGamePersonalDataEntriesRequest	528
k_EGCMsgTerminateGamePersonalDataEntriesResponse	529
k_EGCMsgRecurringSubscriptionStatusChange	530
k_EGCMsgDirectServiceMethod	531
k_EGCMsgDirectServiceMethodResponse	532

ESOMsg

ESO Msg k_ESOMsg_Create k_ESOMsg_Update k_ESOMsg_Destroy k_ESOMsg_CacheSubscribed k_ESOMsg_CacheUnsubscribed k_ESOMsg_UpdateMultiple k_ESOMsg_CacheSubscriptionCheck k_ESOMsg_CacheSubscriptionRefresh

Schema entity: ESOMsg

Name	Number	Message
k_ESOMsg_Create	21
k_ESOMsg_Update	22
k_ESOMsg_Destroy	23
k_ESOMsg_CacheSubscribed	24
k_ESOMsg_CacheUnsubscribed	25
k_ESOMsg_UpdateMultiple	26
k_ESOMsg_CacheSubscriptionCheck	27
k_ESOMsg_CacheSubscriptionRefresh	28

EGCBaseClientMsg

EGC Base Client Msg EGCBase BaseClient ClientMsg k_EMsgGCClientWelcome k_EMsgGCServerWelcome k_EMsgGCClientHello k_EMsgGCServerHello k_EMsgGCClientConnectionStatus k_EMsgGCServerConnectionStatus k_EMsgGCClientHelloPartner k_EMsgGCClientHelloPW k_EMsgGCClientHelloR2 k_EMsgGCClientHelloR3 k_EMsgGCClientHelloR4

Schema entity: EGCBaseClientMsg

Name	Number	Message
k_EMsgGCClientWelcome	4004
k_EMsgGCServerWelcome	4005
k_EMsgGCClientHello	4006
k_EMsgGCServerHello	4007
k_EMsgGCClientConnectionStatus	4009
k_EMsgGCServerConnectionStatus	4010
k_EMsgGCClientHelloPartner	4011
k_EMsgGCClientHelloPW	4012
k_EMsgGCClientHelloR2	4013
k_EMsgGCClientHelloR3	4014
k_EMsgGCClientHelloR4	4015

EGCToGCMsg

EGC To GC Msg EGCTo ToGC GCMsg k_EGCToGCMsgMasterAck k_EGCToGCMsgMasterAckResponse k_EGCToGCMsgRouted k_EGCToGCMsgRoutedReply k_EMsgUpdateSessionIP k_EMsgRequestSessionIP k_EMsgRequestSessionIPResponse k_EGCToGCMsgMasterStartupComplete

Schema entity: EGCToGCMsg

Name	Number	Message
k_EGCToGCMsgMasterAck	150
k_EGCToGCMsgMasterAckResponse	151
k_EGCToGCMsgRouted	152
k_EGCToGCMsgRoutedReply	153
k_EMsgUpdateSessionIP	154
k_EMsgRequestSessionIP	155
k_EMsgRequestSessionIPResponse	156
k_EGCToGCMsgMasterStartupComplete	157

ECommunityItemClass

Community Item Class CommunityItem ItemClass k_ECommunityItemClass_Invalid k_ECommunityItemClass_Badge k_ECommunityItemClass_GameCard k_ECommunityItemClass_ProfileBackground k_ECommunityItemClass_Emoticon k_ECommunityItemClass_BoosterPack k_ECommunityItemClass_Consumable k_ECommunityItemClass_GameGoo k_ECommunityItemClass_ProfileModifier k_ECommunityItemClass_Scene k_ECommunityItemClass_SalienItem

Schema entity: ECommunityItemClass

Name	Number	Message
k_ECommunityItemClass_Invalid	0
k_ECommunityItemClass_Badge	1
k_ECommunityItemClass_GameCard	2
k_ECommunityItemClass_ProfileBackground	3
k_ECommunityItemClass_Emoticon	4
k_ECommunityItemClass_BoosterPack	5
k_ECommunityItemClass_Consumable	6
k_ECommunityItemClass_GameGoo	7
k_ECommunityItemClass_ProfileModifier	8
k_ECommunityItemClass_Scene	9
k_ECommunityItemClass_SalienItem	10

ECommunityItemAttribute

Community Item Attribute CommunityItem ItemAttribute k_ECommunityItemAttribute_Invalid k_ECommunityItemAttribute_CardBorder k_ECommunityItemAttribute_Level k_ECommunityItemAttribute_IssueNumber k_ECommunityItemAttribute_TradableTime k_ECommunityItemAttribute_StorePackageID k_ECommunityItemAttribute_CommunityItemAppID k_ECommunityItemAttribute_CommunityItemType k_ECommunityItemAttribute_ProfileModiferEnabled k_ECommunityItemAttribute_ExpiryTime

Schema entity: ECommunityItemAttribute

Name	Number	Message
k_ECommunityItemAttribute_Invalid	0
k_ECommunityItemAttribute_CardBorder	1
k_ECommunityItemAttribute_Level	2
k_ECommunityItemAttribute_IssueNumber	3
k_ECommunityItemAttribute_TradableTime	4
k_ECommunityItemAttribute_StorePackageID	5
k_ECommunityItemAttribute_CommunityItemAppID	6
k_ECommunityItemAttribute_CommunityItemType	7
k_ECommunityItemAttribute_ProfileModiferEnabled	8
k_ECommunityItemAttribute_ExpiryTime	9

Messages

CMsgGCHVacVerificationChange

Msg GCH Vac Verification Change MsgGCH GCHVac VacVerification VerificationChange steamid appid is_verified

Field	Number	Label	Type	Default	Description
steamid	1	optional	fixed64
appid	2	optional	uint32
is_verified	3	optional	bool

CMsgGCHAccountPhoneNumberChange

Msg GCH Account Phone Number Change MsgGCH GCHAccount AccountPhone PhoneNumber NumberChange steamid appid phone_id is_verified is_identifying

Field	Number	Label	Type	Default	Description
steamid	1	optional	fixed64
appid	2	optional	uint32
phone_id	3	optional	uint64
is_verified	4	optional	bool
is_identifying	5	optional	bool

CMsgGCHInviteUserToLobby

Msg GCH Invite User To Lobby MsgGCH GCHInvite InviteUser UserTo ToLobby steamid appid steamid_invited steamid_lobby

Field	Number	Label	Type	Default	Description
steamid	1	optional	fixed64
appid	2	optional	uint32
steamid_invited	3	optional	fixed64
steamid_lobby	4	optional	fixed64

CMsgGCHRecurringSubscriptionStatusChange

Msg GCH Recurring Subscription Status Change MsgGCH GCHRecurring RecurringSubscription SubscriptionStatus StatusChange steamid appid agreementid active

Field	Number	Label	Type	Default	Description
steamid	1	optional	fixed64
appid	2	optional	uint32
agreementid	3	optional	fixed64
active	4	optional	bool

CQuest_PublisherAddCommunityItemsToPlayer_Request

CQuest Quest PublisherAddCommunityItemsToPlayer Publisher Add Community Items To Player PublisherAdd AddCommunity CommunityItems ItemsTo ToPlayer Request steamid appid match_item_type match_item_class prefix_item_name attributes note

Field	Number	Label	Type	Default	Description
steamid	1	optional	uint64
appid	2	optional	uint32
match_item_type	3	optional	uint32
match_item_class	4	optional	uint32
prefix_item_name	5	optional	string
attributes	6	repeated	CQuest_PublisherAddCommunityItemsToPlayer_Request.Attribute
note	7	optional	string

CQuest_PublisherAddCommunityItemsToPlayer_Request.Attribute

attribute value

Referenced by (1): CQuest_PublisherAddCommunityItemsToPlayer_Request

Field	Number	Label	Type	Default	Description
attribute	1	optional	uint32
value	2	optional	uint64

CQuest_PublisherAddCommunityItemsToPlayer_Response

CQuest Quest PublisherAddCommunityItemsToPlayer Publisher Add Community Items To Player PublisherAdd AddCommunity CommunityItems ItemsTo ToPlayer Response items_matched items_granted

Field	Number	Label	Type	Default	Description
items_matched	1	optional	uint32
items_granted	2	optional	uint32

CCommunity_GamePersonalDataCategoryInfo

CCommunity Community GamePersonalDataCategoryInfo Game Personal Data Category Info GamePersonal PersonalData DataCategory CategoryInfo type localization_token template_file

Referenced by (1): CCommunity_GetGamePersonalDataCategories_Response

Field	Number	Label	Type	Default	Description
type	1	optional	string
localization_token	2	optional	string
template_file	3	optional	string

CCommunity_GetGamePersonalDataCategories_Request

CCommunity Community GetGamePersonalDataCategories Get Game Personal Data Categories GetGame GamePersonal PersonalData DataCategories Request appid

Field	Number	Label	Type	Default	Description
appid	1	optional	uint32

CCommunity_GetGamePersonalDataCategories_Response

CCommunity Community GetGamePersonalDataCategories Get Game Personal Data Categories GetGame GamePersonal PersonalData DataCategories Response categories app_assets_basename

Field	Number	Label	Type	Default	Description
categories	1	repeated	CCommunity_GamePersonalDataCategoryInfo
app_assets_basename	2	optional	string

CCommunity_GetGamePersonalDataEntries_Request

CCommunity Community GetGamePersonalDataEntries Get Game Personal Data Entries GetGame GamePersonal PersonalData DataEntries Request appid steamid type continue_token

Field	Number	Label	Type	Default	Description
appid	1	optional	uint32
steamid	2	optional	uint64
type	3	optional	string
continue_token	4	optional	string

CCommunity_GetGamePersonalDataEntries_Response

CCommunity Community GetGamePersonalDataEntries Get Game Personal Data Entries GetGame GamePersonal PersonalData DataEntries Response gceresult entries continue_token continue_text

Field	Number	Label	Type	Default	Description
gceresult	1	optional	uint32
entries	2	repeated	string
continue_token	3	optional	string
continue_text	4	optional	string

CCommunity_TerminateGamePersonalDataEntries_Request

CCommunity Community TerminateGamePersonalDataEntries Terminate Game Personal Data Entries TerminateGame GamePersonal PersonalData DataEntries Request appid steamid

Field	Number	Label	Type	Default	Description
appid	1	optional	uint32
steamid	2	optional	uint64

CCommunity_TerminateGamePersonalDataEntries_Response

CCommunity Community TerminateGamePersonalDataEntries Terminate Game Personal Data Entries TerminateGame GamePersonal PersonalData DataEntries Response gceresult

Field	Number	Label	Type	Default	Description
gceresult	1	optional	uint32

Reference graph

Message reference graph (2 edges)

flowchart LR
    n0["CQuest_PublisherAddCommunityItemsToPlayer_Request"]
    n1["CQuest_PublisherAddCommunityItemsToPlayer_Request.Attribute"]
    n0 --> n1
    n2["CCommunity_GetGamePersonalDataCategories_Response"]
    n3["CCommunity_GamePersonalDataCategoryInfo"]
    n2 --> n3