diff --git a/nex/register_common_secure_server_protocols.go b/nex/register_common_secure_server_protocols.go
index 1780c47..b5f7c21 100644
--- a/nex/register_common_secure_server_protocols.go
+++ b/nex/register_common_secure_server_protocols.go
@@ -26,9 +26,37 @@ import (
 
 	matchmakingtypes "github.com/PretendoNetwork/nex-protocols-go/v2/match-making/types"
 
-	common_globals "github.com/PretendoNetwork/nex-protocols-common-go/v2/globals"
+	commonglobals "github.com/PretendoNetwork/nex-protocols-common-go/v2/globals"
 )
 
+func MatchmakeExtensionCloseParticipation(err error, packet nex.PacketInterface, callID uint32, gid *types.PrimitiveU32) (*nex.RMCMessage, *nex.Error) {
+	if err != nil {
+		globals.Logger.Error(err.Error())
+		return nil, nex.NewError(nex.ResultCodes.Core.InvalidArgument, "change_error")
+	}
+
+	session, ok := commonglobals.Sessions[gid.Value]
+	if !ok {
+		return nil, nex.NewError(nex.ResultCodes.RendezVous.SessionVoid, "change_error")
+	}
+
+	connection := packet.Sender().(*nex.PRUDPConnection)
+	endpoint := connection.Endpoint().(*nex.PRUDPEndPoint)
+
+	// * PUYOPUYOTETRIS has everyone send CloseParticipation here, not just the owner of the room.
+	// * So, if a non-owner asks, just lie and claim success without actually changing anything.
+	if !session.GameMatchmakeSession.Gathering.OwnerPID.Equals(connection.PID()) {
+		session.GameMatchmakeSession.OpenParticipation = types.NewPrimitiveBool(false)
+	}
+
+	rmcResponse := nex.NewRMCSuccess(endpoint, nil)
+	rmcResponse.ProtocolID = matchmakeextension.ProtocolID
+	rmcResponse.MethodID = matchmakeextension.MethodCloseParticipation
+	rmcResponse.CallID = callID
+
+	return rmcResponse, nil
+}
+
 func CreateReportDBRecord(_ *types.PID, _ *types.PrimitiveU32, _ *types.QBuffer) error {
 	return nil
 }
@@ -86,9 +114,17 @@ func registerCommonSecureServerProtocols() {
 	matchmakeExtensionProtocol := matchmakeextension.NewProtocol()
 	globals.SecureEndpoint.RegisterServiceProtocol(matchmakeExtensionProtocol)
 	commonMatchmakeExtensionProtocol := commonmatchmakeextension.NewCommonProtocol(matchmakeExtensionProtocol)
+	// * Handle custom CloseParticipation behaviour
+	matchmakeExtensionProtocol.SetHandlerCloseParticipation(MatchmakeExtensionCloseParticipation)
 
 	commonMatchmakeExtensionProtocol.OnAfterAutoMatchmakeWithSearchCriteriaPostpone = func(packet nex.PacketInterface, lstSearchCriteria *types.List[*matchmakingtypes.MatchmakeSessionSearchCriteria], anyGathering *types.AnyDataHolder, strMessage *types.String) {
-		for _, session := range common_globals.Sessions {
+		globals.Logger.Info("Matchmake search criteria:")
+		for _, criteria := range lstSearchCriteria.Slice() {
+			globals.Logger.Info(criteria.FormatToString(1))
+		}
+
+		globals.Logger.Info("Active matchmaking sessions:")
+		for _, session := range commonglobals.Sessions {
 			globals.Logger.Info(session.GameMatchmakeSession.FormatToString(1))
 		}
 	}