gcsdk_gcmessages.proto

Protobufs / gcsdk_gcmessages.proto

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

Group: GC and Steam SDKMessages: 36 top-level, 50 totalEnums: 2 top-level, 2 total

Imports: steammessages.proto

Enums

GCClientLauncherType

GC Client Launcher Type GCClient ClientLauncher LauncherType GCClientLauncherType_DEFAULT GCClientLauncherType_PERFECTWORLD GCClientLauncherType_STEAMCHINA GCClientLauncherType_SOURCE2

Schema entity: GCClientLauncherType

Name	Number	Message
GCClientLauncherType_DEFAULT	0
GCClientLauncherType_PERFECTWORLD	1
GCClientLauncherType_STEAMCHINA	2
GCClientLauncherType_SOURCE2	3

GCConnectionStatus

GC Connection Status GCConnection ConnectionStatus GCConnectionStatus_HAVE_SESSION GCConnectionStatus_GC_GOING_DOWN GCConnectionStatus_NO_SESSION GCConnectionStatus_NO_SESSION_IN_LOGON_QUEUE GCConnectionStatus_NO_STEAM

Schema entity: GCConnectionStatus

Name	Number	Message
GCConnectionStatus_HAVE_SESSION	0
GCConnectionStatus_GC_GOING_DOWN	1
GCConnectionStatus_NO_SESSION	2
GCConnectionStatus_NO_SESSION_IN_LOGON_QUEUE	3
GCConnectionStatus_NO_STEAM	4

Messages

CMsgSOIDOwner

Msg SOID Owner MsgSOID SOIDOwner type id

Referenced by (7): CMsgSOCacheHaveVersion, CMsgSOCacheSubscribed, CMsgSOCacheSubscriptionCheck, CMsgSOCacheSubscriptionRefresh, CMsgSOCacheUnsubscribed, CMsgSOMultipleObjects, CMsgSOSingleObject

Field	Number	Label	Type	Default	Description
type	1	optional	uint32
id	2	optional	uint64

CMsgSOSingleObject

Msg SO Single Object MsgSO SOSingle SingleObject type_id object_data version owner_soid

Field	Number	Label	Type	Default	Description
type_id	2	optional	int32
object_data	3	optional	bytes
version	4	optional	fixed64
owner_soid	5	optional	CMsgSOIDOwner

CMsgSOMultipleObjects

Msg SO Multiple Objects MsgSO SOMultiple MultipleObjects objects_modified version owner_soid

Field	Number	Label	Type	Default	Description
objects_modified	2	repeated	CMsgSOMultipleObjects.SingleObject
version	3	optional	fixed64
owner_soid	6	optional	CMsgSOIDOwner

CMsgSOMultipleObjects.SingleObject

Single Object type_id object_data

Referenced by (1): CMsgSOMultipleObjects

Field	Number	Label	Type	Default	Description
type_id	1	optional	int32
object_data	2	optional	bytes

CMsgSOCacheSubscribed

Msg SO Cache Subscribed MsgSO SOCache CacheSubscribed objects version owner_soid

Referenced by (1): CMsgClientWelcome

Field	Number	Label	Type	Default	Description
objects	2	repeated	CMsgSOCacheSubscribed.SubscribedType
version	3	optional	fixed64
owner_soid	4	optional	CMsgSOIDOwner

CMsgSOCacheSubscribed.SubscribedType

Subscribed Type type_id object_data

Referenced by (1): CMsgSOCacheSubscribed

Field	Number	Label	Type	Default	Description
type_id	1	optional	int32
object_data	2	repeated	bytes

CMsgSOCacheUnsubscribed

Msg SO Cache Unsubscribed MsgSO SOCache CacheUnsubscribed owner_soid

Field	Number	Label	Type	Default	Description
owner_soid	2	optional	CMsgSOIDOwner

CMsgSOCacheSubscriptionCheck

Msg SO Cache Subscription Check MsgSO SOCache CacheSubscription SubscriptionCheck version owner_soid

Referenced by (1): CMsgClientWelcome

Field	Number	Label	Type	Default	Description
version	2	optional	fixed64
owner_soid	3	optional	CMsgSOIDOwner

CMsgSOCacheSubscriptionRefresh

Msg SO Cache Subscription Refresh MsgSO SOCache CacheSubscription SubscriptionRefresh owner_soid

Field	Number	Label	Type	Default	Description
owner_soid	2	optional	CMsgSOIDOwner

CMsgSOCacheVersion

Msg SO Cache Version MsgSO SOCache CacheVersion version

Field	Number	Label	Type	Default	Description
version	1	optional	fixed64

CMsgAccountDetails

Msg Account Details MsgAccount AccountDetails valid account_name public_profile public_inventory vac_banned cyber_cafe school_account free_trial_account subscribed low_violence limited trusted package time_cached account_locked community_banned trade_banned eligible_for_community_market

Field	Number	Label	Type	Default	Description
valid	1	optional	bool
account_name	2	optional	string
public_profile	4	optional	bool
public_inventory	5	optional	bool
vac_banned	6	optional	bool
cyber_cafe	7	optional	bool
school_account	8	optional	bool
free_trial_account	9	optional	bool
subscribed	10	optional	bool
low_violence	11	optional	bool
limited	12	optional	bool
trusted	13	optional	bool
package	14	optional	uint32
time_cached	15	optional	fixed32
account_locked	16	optional	bool
community_banned	17	optional	bool
trade_banned	18	optional	bool
eligible_for_community_market	19	optional	bool

CMsgGCMultiplexMessage

Msg GC Multiplex Message MsgGC GCMultiplex MultiplexMessage msgtype payload steamids replytogc

Field	Number	Label	Type	Default	Description
msgtype	1	optional	uint32
payload	2	optional	bytes
steamids	3	repeated	fixed64
replytogc	4	optional	bool

CMsgGCMultiplexMessage_Response

CMsgGCMultiplexMessage Msg GC Multiplex Message MsgGC GCMultiplex MultiplexMessage Response msgtype

Field	Number	Label	Type	Default	Description
msgtype	1	optional	uint32

CGCToGCMsgMasterAck

CGC To GC Msg Master Ack CGCTo ToGC GCMsg MsgMaster MasterAck dir_index gc_type

Field	Number	Label	Type	Default	Description
dir_index	1	optional	uint32
gc_type	2	optional	uint32

CGCToGCMsgMasterAck_Response

CGCToGCMsgMasterAck CGC To GC Msg Master Ack CGCTo ToGC GCMsg MsgMaster MasterAck Response eresult

Field	Number	Label	Type	Default	Description
eresult	1	optional	int32	2

CGCToGCMsgMasterStartupComplete

CGC To GC Msg Master Startup Complete CGCTo ToGC GCMsg MsgMaster MasterStartup StartupComplete

(no fields)

CGCToGCMsgRouted

CGC To GC Msg Routed CGCTo ToGC GCMsg MsgRouted msg_type sender_id net_message ip

Field	Number	Label	Type	Default	Description
msg_type	1	optional	uint32
sender_id	2	optional	fixed64
net_message	3	optional	bytes
ip	4	optional	uint32

CGCToGCMsgRoutedReply

CGC To GC Msg Routed Reply CGCTo ToGC GCMsg MsgRouted RoutedReply msg_type net_message

Field	Number	Label	Type	Default	Description
msg_type	1	optional	uint32
net_message	2	optional	bytes

CMsgGCUpdateSessionIP

Msg GC Update Session IP MsgGC GCUpdate UpdateSession SessionIP steamid ip

Field	Number	Label	Type	Default	Description
steamid	1	optional	fixed64
ip	2	optional	fixed32

CMsgGCRequestSessionIP

Msg GC Request Session IP MsgGC GCRequest RequestSession SessionIP steamid

Field	Number	Label	Type	Default	Description
steamid	1	optional	fixed64

CMsgGCRequestSessionIPResponse

Msg GC Request Session IP Response MsgGC GCRequest RequestSession SessionIP IPResponse ip

Field	Number	Label	Type	Default	Description
ip	1	optional	fixed32

CMsgSOCacheHaveVersion

Msg SO Cache Have Version MsgSO SOCache CacheHave HaveVersion soid version

Referenced by (2): CMsgClientHello, CMsgServerHello

Field	Number	Label	Type	Default	Description
soid	1	optional	CMsgSOIDOwner
version	2	optional	fixed64

CMsgClientHello

Msg Client Hello MsgClient ClientHello version socache_have_versions client_session_need client_launcher partner_srcid partner_accountid partner_accountflags partner_accountbalance steam_launcher

Field	Number	Label	Type	Default	Description
version	1	optional	uint32
socache_have_versions	2	repeated	CMsgSOCacheHaveVersion
client_session_need	3	optional	uint32
client_launcher	4	optional	uint32
partner_srcid	5	optional	uint32
partner_accountid	6	optional	uint32
partner_accountflags	7	optional	uint32
partner_accountbalance	8	optional	uint32
steam_launcher	9	optional	uint32

CMsgServerHello

Msg Server Hello MsgServer ServerHello version socache_have_versions legacy_client_session_need client_launcher legacy_steamdatagram_routing required_internal_addr steamdatagram_login socache_control

Field	Number	Label	Type	Default	Description
version	1	optional	uint32
socache_have_versions	2	repeated	CMsgSOCacheHaveVersion
legacy_client_session_need	3	optional	uint32
client_launcher	4	optional	uint32
legacy_steamdatagram_routing	6	optional	bytes
required_internal_addr	7	optional	uint32
steamdatagram_login	8	optional	bytes
socache_control	9	optional	uint32

CMsgClientWelcome

Msg Client Welcome MsgClient ClientWelcome version game_data outofdate_subscribed_caches uptodate_subscribed_caches location game_data2 rtime32_gc_welcome_timestamp currency balance balance_url txn_country_code

Field	Number	Label	Type	Default	Description
version	1	optional	uint32
game_data	2	optional	bytes
outofdate_subscribed_caches	3	repeated	CMsgSOCacheSubscribed
uptodate_subscribed_caches	4	repeated	CMsgSOCacheSubscriptionCheck
location	5	optional	CMsgClientWelcome.Location
game_data2	6	optional	bytes
rtime32_gc_welcome_timestamp	7	optional	uint32
currency	8	optional	uint32
balance	9	optional	uint32
balance_url	10	optional	string
txn_country_code	11	optional	string

CMsgClientWelcome.Location

latitude longitude country

Referenced by (1): CMsgClientWelcome

Field	Number	Label	Type	Default	Description
latitude	1	optional	float
longitude	2	optional	float
country	3	optional	string

CMsgConnectionStatus

Msg Connection Status MsgConnection ConnectionStatus status client_session_need queue_position queue_size wait_seconds estimated_wait_seconds_remaining

Field	Number	Label	Type	Default	Description
status	1	optional	GCConnectionStatus
client_session_need	2	optional	uint32
queue_position	3	optional	int32
queue_size	4	optional	int32
wait_seconds	5	optional	int32
estimated_wait_seconds_remaining	6	optional	int32

CWorkshop_PopulateItemDescriptions_Request

CWorkshop Workshop PopulateItemDescriptions Populate Item Descriptions PopulateItem ItemDescriptions Request appid languages

Field	Number	Label	Type	Default	Description
appid	1	optional	uint32
languages	2	repeated	CWorkshop_PopulateItemDescriptions_Request.ItemDescriptionsLanguageBlock

CWorkshop_PopulateItemDescriptions_Request.SingleItemDescription

Single Item Description SingleItem ItemDescription gameitemid item_description one_per_account

Referenced by (1): CWorkshop_PopulateItemDescriptions_Request.ItemDescriptionsLanguageBlock

Field	Number	Label	Type	Default	Description
gameitemid	1	optional	uint32
item_description	2	optional	string
one_per_account	3	optional	bool

CWorkshop_PopulateItemDescriptions_Request.ItemDescriptionsLanguageBlock

Item Descriptions Language Block ItemDescriptions DescriptionsLanguage LanguageBlock language descriptions

Referenced by (1): CWorkshop_PopulateItemDescriptions_Request

Field	Number	Label	Type	Default	Description
language	1	optional	string
descriptions	2	repeated	CWorkshop_PopulateItemDescriptions_Request.SingleItemDescription

CWorkshop_GetContributors_Request

CWorkshop Workshop GetContributors Get Contributors Request appid gameitemid

Field	Number	Label	Type	Default	Description
appid	1	optional	uint32
gameitemid	2	optional	uint32

CWorkshop_GetContributors_Response

CWorkshop Workshop GetContributors Get Contributors Response contributors

Field	Number	Label	Type	Default	Description
contributors	1	repeated	fixed64

CWorkshop_SetItemPaymentRules_Request

CWorkshop Workshop SetItemPaymentRules Set Item Payment Rules SetItem ItemPayment PaymentRules Request appid gameitemid associated_workshop_files partner_accounts validate_only make_workshop_files_subscribable associated_workshop_file_for_direct_payments

Field	Number	Label	Type	Default	Description
appid	1	optional	uint32
gameitemid	2	optional	uint32
associated_workshop_files	3	repeated	CWorkshop_SetItemPaymentRules_Request.WorkshopItemPaymentRule
partner_accounts	4	repeated	CWorkshop_SetItemPaymentRules_Request.PartnerItemPaymentRule
validate_only	5	optional	bool
make_workshop_files_subscribable	6	optional	bool
associated_workshop_file_for_direct_payments	7	optional	CWorkshop_SetItemPaymentRules_Request.WorkshopDirectPaymentRule

CWorkshop_SetItemPaymentRules_Request.WorkshopItemPaymentRule

Workshop Item Payment Rule WorkshopItem ItemPayment PaymentRule workshop_file_id revenue_percentage rule_description rule_type

Referenced by (1): CWorkshop_SetItemPaymentRules_Request

Field	Number	Label	Type	Default	Description
workshop_file_id	1	optional	uint64
revenue_percentage	2	optional	float
rule_description	3	optional	string
rule_type	4	optional	uint32	1

CWorkshop_SetItemPaymentRules_Request.WorkshopDirectPaymentRule

Workshop Direct Payment Rule WorkshopDirect DirectPayment PaymentRule workshop_file_id rule_description

Referenced by (1): CWorkshop_SetItemPaymentRules_Request

Field	Number	Label	Type	Default	Description
workshop_file_id	1	optional	uint64
rule_description	2	optional	string

CWorkshop_SetItemPaymentRules_Request.PartnerItemPaymentRule

Partner Item Payment Rule PartnerItem ItemPayment PaymentRule account_id revenue_percentage rule_description

Referenced by (1): CWorkshop_SetItemPaymentRules_Request

Field	Number	Label	Type	Default	Description
account_id	1	optional	uint32
revenue_percentage	2	optional	float
rule_description	3	optional	string

CWorkshop_SetItemPaymentRules_Response

CWorkshop Workshop SetItemPaymentRules Set Item Payment Rules SetItem ItemPayment PaymentRules Response

(no fields)

CGameServers_AggregationQuery_Request

CGameServers Game Servers GameServers AggregationQuery Aggregation Query Request filter group_fields

Field	Number	Label	Type	Default	Description
filter	1	optional	string
group_fields	3	repeated	string

CGameServers_AggregationQuery_Response

CGameServers Game Servers GameServers AggregationQuery Aggregation Query Response groups

Field	Number	Label	Type	Default	Description
groups	1	repeated	CGameServers_AggregationQuery_Response.Group

CGameServers_AggregationQuery_Response.Group

group_values servers_empty servers_full servers_total players_humans players_bots player_capacity

Referenced by (1): CGameServers_AggregationQuery_Response

Field	Number	Label	Type	Default	Description
group_values	1	repeated	string
servers_empty	2	optional	uint32
servers_full	3	optional	uint32
servers_total	4	optional	uint32
players_humans	5	optional	uint32
players_bots	6	optional	uint32
player_capacity	7	optional	uint32

CWorkshop_AddSpecialPayment_Request

CWorkshop Workshop AddSpecialPayment Add Special Payment AddSpecial SpecialPayment Request appid gameitemid date payment_us_usd payment_row_usd

Field	Number	Label	Type	Default	Description
appid	1	optional	uint32
gameitemid	2	optional	uint32
date	3	optional	string
payment_us_usd	4	optional	uint64
payment_row_usd	5	optional	uint64

CWorkshop_AddSpecialPayment_Response

CWorkshop Workshop AddSpecialPayment Add Special Payment AddSpecial SpecialPayment Response

(no fields)

CProductInfo_SetRichPresenceLocalization_Request

CProductInfo Product Info ProductInfo SetRichPresenceLocalization Set Rich Presence Localization SetRich RichPresence PresenceLocalization Request appid languages steamid

Field	Number	Label	Type	Default	Description
appid	1	optional	uint32
languages	2	repeated	CProductInfo_SetRichPresenceLocalization_Request.LanguageSection
steamid	3	optional	uint64

CProductInfo_SetRichPresenceLocalization_Request.Token

token value

Referenced by (1): CProductInfo_SetRichPresenceLocalization_Request.LanguageSection

Field	Number	Label	Type	Default	Description
token	1	optional	string
value	2	optional	string

CProductInfo_SetRichPresenceLocalization_Request.LanguageSection

Language Section language tokens

Referenced by (1): CProductInfo_SetRichPresenceLocalization_Request

Field	Number	Label	Type	Default	Description
language	1	optional	string
tokens	2	repeated	CProductInfo_SetRichPresenceLocalization_Request.Token

CProductInfo_SetRichPresenceLocalization_Response

CProductInfo Product Info ProductInfo SetRichPresenceLocalization Set Rich Presence Localization SetRich RichPresence PresenceLocalization Response

(no fields)

CMsgSerializedSOCache

Msg Serialized SO Cache MsgSerialized SerializedSO SOCache file_version caches gc_socache_file_version

Field	Number	Label	Type	Default	Description
file_version	1	optional	uint32
caches	2	repeated	CMsgSerializedSOCache.Cache
gc_socache_file_version	3	optional	uint32

CMsgSerializedSOCache.TypeCache

Type Cache type objects service_id

Referenced by (1): CMsgSerializedSOCache.Cache

Field	Number	Label	Type	Default	Description
type	1	optional	uint32
objects	2	repeated	bytes
service_id	3	optional	uint32

CMsgSerializedSOCache.Cache

type id versions type_caches

Referenced by (1): CMsgSerializedSOCache

Field	Number	Label	Type	Default	Description
type	1	optional	uint32
id	2	optional	uint64
versions	3	repeated	CMsgSerializedSOCache.Cache.Version
type_caches	4	repeated	CMsgSerializedSOCache.TypeCache

CMsgSerializedSOCache.Cache.Version

service version

Referenced by (1): CMsgSerializedSOCache.Cache

Field	Number	Label	Type	Default	Description
service	1	optional	uint32
version	2	optional	uint64

Reference graph

Message reference graph (25 edges)

flowchart LR
    n0["CMsgSOSingleObject"]
    n1["CMsgSOIDOwner"]
    n0 --> n1
    n2["CMsgSOMultipleObjects"]
    n3["CMsgSOMultipleObjects.SingleObject"]
    n2 --> n3
    n2 --> n1
    n4["CMsgSOCacheSubscribed"]
    n5["CMsgSOCacheSubscribed.SubscribedType"]
    n4 --> n5
    n4 --> n1
    n6["CMsgSOCacheUnsubscribed"]
    n6 --> n1
    n7["CMsgSOCacheSubscriptionCheck"]
    n7 --> n1
    n8["CMsgSOCacheSubscriptionRefresh"]
    n8 --> n1
    n9["CMsgSOCacheHaveVersion"]
    n9 --> n1
    n10["CMsgClientHello"]
    n10 --> n9
    n11["CMsgServerHello"]
    n11 --> n9
    n12["CMsgClientWelcome"]
    n12 --> n4
    n12 --> n7
    n13["CMsgClientWelcome.Location"]
    n12 --> n13
    n14["CWorkshop_PopulateItemDescriptions_Request"]
    n15["CWorkshop_PopulateItemDescriptions_Request.ItemDescriptionsLanguageBlock"]
    n14 --> n15
    n16["CWorkshop_PopulateItemDescriptions_Request.SingleItemDescription"]
    n15 --> n16
    n17["CWorkshop_SetItemPaymentRules_Request"]
    n18["CWorkshop_SetItemPaymentRules_Request.WorkshopItemPaymentRule"]
    n17 --> n18
    n19["CWorkshop_SetItemPaymentRules_Request.PartnerItemPaymentRule"]
    n17 --> n19
    n20["CWorkshop_SetItemPaymentRules_Request.WorkshopDirectPaymentRule"]
    n17 --> n20
    n21["CGameServers_AggregationQuery_Response"]
    n22["CGameServers_AggregationQuery_Response.Group"]
    n21 --> n22
    n23["CProductInfo_SetRichPresenceLocalization_Request"]
    n24["CProductInfo_SetRichPresenceLocalization_Request.LanguageSection"]
    n23 --> n24
    n25["CProductInfo_SetRichPresenceLocalization_Request.Token"]
    n24 --> n25
    n26["CMsgSerializedSOCache"]
    n27["CMsgSerializedSOCache.Cache"]
    n26 --> n27
    n28["CMsgSerializedSOCache.Cache.Version"]
    n27 --> n28
    n29["CMsgSerializedSOCache.TypeCache"]
    n27 --> n29