diff --git a/src/common/logging/backend.cpp b/src/common/logging/backend.cpp
index 26cd75a3e3..618be0864b 100644
--- a/src/common/logging/backend.cpp
+++ b/src/common/logging/backend.cpp
@@ -48,6 +48,7 @@ namespace Log {
     SUB(Service, NS)                                                                               \
     SUB(Service, NVDRV)                                                                            \
     SUB(Service, PCTL)                                                                             \
+    SUB(Service, PREPO)                                                                            \
     SUB(Service, SET)                                                                              \
     SUB(Service, SM)                                                                               \
     SUB(Service, SPL)                                                                              \
diff --git a/src/common/logging/log.h b/src/common/logging/log.h
index 45821850c9..1b29ce6e09 100644
--- a/src/common/logging/log.h
+++ b/src/common/logging/log.h
@@ -65,6 +65,7 @@ enum class Class : ClassType {
     Service_NS,        ///< The NS services
     Service_NVDRV,     ///< The NVDRV (Nvidia driver) service
     Service_PCTL,      ///< The PCTL (Parental control) service
+    Service_PREPO,     ///< The PREPO (Play report) service
     Service_SET,       ///< The SET (Settings) service
     Service_SM,        ///< The SM (Service manager) service
     Service_SPL,       ///< The SPL service
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index f4be926e4d..45dbd6796f 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -185,6 +185,8 @@ add_library(core STATIC
     hle/service/pctl/module.h
     hle/service/pctl/pctl.cpp
     hle/service/pctl/pctl.h
+    hle/service/prepo/prepo.cpp
+    hle/service/prepo/prepo.h
     hle/service/service.cpp
     hle/service/service.h
     hle/service/set/set.cpp
diff --git a/src/core/hle/service/audio/audren_u.cpp b/src/core/hle/service/audio/audren_u.cpp
index 72810b436f..291885db89 100644
--- a/src/core/hle/service/audio/audren_u.cpp
+++ b/src/core/hle/service/audio/audren_u.cpp
@@ -162,12 +162,13 @@ public:
             {0x3, &IAudioDevice::GetActiveAudioDeviceName, "GetActiveAudioDeviceName"},
             {0x4, &IAudioDevice::QueryAudioDeviceSystemEvent, "QueryAudioDeviceSystemEvent"},
             {0x5, &IAudioDevice::GetActiveChannelCount, "GetActiveChannelCount"},
-            {0x6, nullptr, "ListAudioDeviceNameAuto"},
-            {0x7, nullptr, "SetAudioDeviceOutputVolumeAuto"},
+            {0x6, &IAudioDevice::ListAudioDeviceName,
+             "ListAudioDeviceNameAuto"}, // TODO(ogniK): Confirm if autos are identical to non auto
+            {0x7, &IAudioDevice::SetAudioDeviceOutputVolume, "SetAudioDeviceOutputVolumeAuto"},
             {0x8, nullptr, "GetAudioDeviceOutputVolumeAuto"},
-            {0x10, nullptr, "GetActiveAudioDeviceNameAuto"},
-            {0x11, nullptr, "QueryAudioDeviceInputEvent"},
-            {0x12, nullptr, "QueryAudioDeviceOutputEvent"}};
+            {0xa, &IAudioDevice::GetActiveAudioDeviceName, "GetActiveAudioDeviceNameAuto"},
+            {0xb, nullptr, "QueryAudioDeviceInputEvent"},
+            {0xc, nullptr, "QueryAudioDeviceOutputEvent"}};
         RegisterHandlers(functions);
 
         buffer_event =
@@ -257,7 +258,7 @@ void AudRenU::GetAudioRendererWorkBufferSize(Kernel::HLERequestContext& ctx) {
     IPC::ResponseBuilder rb{ctx, 4};
 
     rb.Push(RESULT_SUCCESS);
-    rb.Push<u64>(0x400);
+    rb.Push<u64>(0x4000);
 
     NGLOG_WARNING(Service_Audio, "(STUBBED) called");
 }
diff --git a/src/core/hle/service/nfp/nfp.cpp b/src/core/hle/service/nfp/nfp.cpp
index 6627aaddcf..cc0247881e 100644
--- a/src/core/hle/service/nfp/nfp.cpp
+++ b/src/core/hle/service/nfp/nfp.cpp
@@ -12,10 +12,52 @@ namespace Service::NFP {
 Module::Interface::Interface(std::shared_ptr<Module> module, const char* name)
     : ServiceFramework(name), module(std::move(module)) {}
 
-void Module::Interface::Unknown(Kernel::HLERequestContext& ctx) {
-    NGLOG_WARNING(Service_NFP, "(STUBBED) called");
-    IPC::ResponseBuilder rb{ctx, 2};
+class IUser final : public ServiceFramework<IUser> {
+public:
+    IUser() : ServiceFramework("IUser") {
+        static const FunctionInfo functions[] = {
+            {0, &IUser::Initialize, "Initialize"},
+            {1, nullptr, "Unknown1"},
+            {2, nullptr, "Unknown2"},
+            {3, nullptr, "Unknown3"},
+            {4, nullptr, "Unknown4"},
+            {5, nullptr, "Unknown5"},
+            {6, nullptr, "Unknown6"},
+            {7, nullptr, "Unknown7"},
+            {8, nullptr, "Unknown8"},
+            {9, nullptr, "Unknown9"},
+            {10, nullptr, "Unknown10"},
+            {11, nullptr, "Unknown11"},
+            {12, nullptr, "Unknown12"},
+            {13, nullptr, "Unknown13"},
+            {14, nullptr, "Unknown14"},
+            {15, nullptr, "Unknown15"},
+            {16, nullptr, "Unknown16"},
+            {17, nullptr, "Unknown17"},
+            {18, nullptr, "Unknown18"},
+            {19, nullptr, "Unknown19"},
+            {20, nullptr, "Unknown20"},
+            {21, nullptr, "Unknown21"},
+            {22, nullptr, "Unknown22"},
+            {23, nullptr, "Unknown23"},
+            {24, nullptr, "Unknown24"},
+        };
+        RegisterHandlers(functions);
+    }
+
+private:
+    void Initialize(Kernel::HLERequestContext& ctx) {
+        NGLOG_WARNING(Service_NFP, "(STUBBED) called");
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+};
+
+void Module::Interface::CreateUserInterface(Kernel::HLERequestContext& ctx) {
+    NGLOG_DEBUG(Service_NFP, "called");
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
     rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IUser>();
 }
 
 void InstallInterfaces(SM::ServiceManager& service_manager) {
diff --git a/src/core/hle/service/nfp/nfp.h b/src/core/hle/service/nfp/nfp.h
index 095209ad84..262a666cb0 100644
--- a/src/core/hle/service/nfp/nfp.h
+++ b/src/core/hle/service/nfp/nfp.h
@@ -14,7 +14,7 @@ public:
     public:
         Interface(std::shared_ptr<Module> module, const char* name);
 
-        void Unknown(Kernel::HLERequestContext& ctx);
+        void CreateUserInterface(Kernel::HLERequestContext& ctx);
 
     protected:
         std::shared_ptr<Module> module;
diff --git a/src/core/hle/service/nfp/nfp_user.cpp b/src/core/hle/service/nfp/nfp_user.cpp
index e94c271e77..b608fe693b 100644
--- a/src/core/hle/service/nfp/nfp_user.cpp
+++ b/src/core/hle/service/nfp/nfp_user.cpp
@@ -9,7 +9,7 @@ namespace Service::NFP {
 NFP_User::NFP_User(std::shared_ptr<Module> module)
     : Module::Interface(std::move(module), "nfp:user") {
     static const FunctionInfo functions[] = {
-        {0, &NFP_User::Unknown, "Unknown"},
+        {0, &NFP_User::CreateUserInterface, "CreateUserInterface"},
     };
     RegisterHandlers(functions);
 }
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.cpp b/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.cpp
index 1e457ae6ef..3c78ecaeaf 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.cpp
@@ -79,6 +79,7 @@ u32 nvhost_ctrl_gpu::GetTPCMasks(const std::vector<u8>& input, std::vector<u8>&
     std::memcpy(&params, input.data(), input.size());
     NGLOG_WARNING(Service_NVDRV, "(STUBBED) called, mask={:#X}, mask_buf_addr={:#X}",
                   params.mask_buf_size, params.mask_buf_addr);
+    params.unk = 0xcafe; // TODO(ogniK): Needs to be non 0, what does this actually do?
     std::memcpy(output.data(), &params, sizeof(params));
     return 0;
 }
diff --git a/src/core/hle/service/prepo/prepo.cpp b/src/core/hle/service/prepo/prepo.cpp
new file mode 100644
index 0000000000..eaf30ee6b7
--- /dev/null
+++ b/src/core/hle/service/prepo/prepo.cpp
@@ -0,0 +1,43 @@
+#include <cinttypes>
+#include "common/logging/log.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/event.h"
+#include "core/hle/service/prepo/prepo.h"
+
+namespace Service::PlayReport {
+PlayReport::PlayReport(const char* name) : ServiceFramework(name) {
+    static const FunctionInfo functions[] = {
+        {10100, nullptr, "SaveReport"},
+        {10101, &PlayReport::SaveReportWithUser, "SaveReportWithUser"},
+        {10200, nullptr, "RequestImmediateTransmission"},
+        {10300, nullptr, "GetTransmissionStatus"},
+        {20100, nullptr, "SaveSystemReport"},
+        {20200, nullptr, "SetOperationMode"},
+        {20101, nullptr, "SaveSystemReportWithUser"},
+        {30100, nullptr, "ClearStorage"},
+        {40100, nullptr, "IsUserAgreementCheckEnabled"},
+        {40101, nullptr, "SetUserAgreementCheckEnabled"},
+        {90100, nullptr, "GetStorageUsage"},
+        {90200, nullptr, "GetStatistics"},
+        {90201, nullptr, "GetThroughputHistory"},
+        {90300, nullptr, "GetLastUploadError"},
+    };
+    RegisterHandlers(functions);
+};
+
+void PlayReport::SaveReportWithUser(Kernel::HLERequestContext& ctx) {
+    // TODO(ogniK): Do we want to add play report?
+    NGLOG_WARNING(Service_PREPO, "(STUBBED) called");
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(RESULT_SUCCESS);
+};
+
+void InstallInterfaces(SM::ServiceManager& service_manager) {
+    std::make_shared<PlayReport>("prepo:a")->InstallAsService(service_manager);
+    std::make_shared<PlayReport>("prepo:m")->InstallAsService(service_manager);
+    std::make_shared<PlayReport>("prepo:s")->InstallAsService(service_manager);
+    std::make_shared<PlayReport>("prepo:u")->InstallAsService(service_manager);
+}
+
+} // namespace Service::PlayReport
diff --git a/src/core/hle/service/prepo/prepo.h b/src/core/hle/service/prepo/prepo.h
new file mode 100644
index 0000000000..3708e0dcb3
--- /dev/null
+++ b/src/core/hle/service/prepo/prepo.h
@@ -0,0 +1,23 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <memory>
+#include <string>
+#include "core/hle/kernel/event.h"
+#include "core/hle/service/service.h"
+
+namespace Service::PlayReport {
+
+class PlayReport final : public ServiceFramework<PlayReport> {
+public:
+    explicit PlayReport(const char* name);
+    ~PlayReport() = default;
+
+private:
+    void SaveReportWithUser(Kernel::HLERequestContext& ctx);
+};
+
+void InstallInterfaces(SM::ServiceManager& service_manager);
+
+} // namespace Service::PlayReport
diff --git a/src/core/hle/service/service.cpp b/src/core/hle/service/service.cpp
index a85c406beb..34d691b90f 100644
--- a/src/core/hle/service/service.cpp
+++ b/src/core/hle/service/service.cpp
@@ -29,7 +29,8 @@
 #include "core/hle/service/nifm/nifm.h"
 #include "core/hle/service/ns/ns.h"
 #include "core/hle/service/nvdrv/nvdrv.h"
-#include "core/hle/service/pctl/module.h"
+#include "core/hle/service/pctl/pctl.h"
+#include "core/hle/service/prepo/prepo.h"
 #include "core/hle/service/service.h"
 #include "core/hle/service/set/settings.h"
 #include "core/hle/service/sm/controller.h"
@@ -192,6 +193,7 @@ void Init(std::shared_ptr<SM::ServiceManager>& sm) {
     NS::InstallInterfaces(*sm);
     Nvidia::InstallInterfaces(*sm);
     PCTL::InstallInterfaces(*sm);
+    PlayReport::InstallInterfaces(*sm);
     Sockets::InstallInterfaces(*sm);
     SPL::InstallInterfaces(*sm);
     SSL::InstallInterfaces(*sm);
diff --git a/src/core/hle/service/ssl/ssl.cpp b/src/core/hle/service/ssl/ssl.cpp
index c7788da5c9..b3dad8b068 100644
--- a/src/core/hle/service/ssl/ssl.cpp
+++ b/src/core/hle/service/ssl/ssl.cpp
@@ -96,12 +96,22 @@ SSL::SSL() : ServiceFramework("ssl") {
         {2, nullptr, "GetCertificates"},
         {3, nullptr, "GetCertificateBufSize"},
         {4, nullptr, "DebugIoctl"},
-        {5, nullptr, "SetInterfaceVersion"},
+        {5, &SSL::SetInterfaceVersion, "SetInterfaceVersion"},
         {6, nullptr, "FlushSessionCache"},
     };
     RegisterHandlers(functions);
 }
 
+void SSL::SetInterfaceVersion(Kernel::HLERequestContext& ctx) {
+    NGLOG_WARNING(Service_SSL, "(STUBBED) called");
+    IPC::RequestParser rp{ctx};
+    u32 unk1 = rp.Pop<u32>(); // Probably minor/major?
+    u32 unk2 = rp.Pop<u32>(); // TODO(ogniK): Figure out what this does
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(RESULT_SUCCESS);
+}
+
 void InstallInterfaces(SM::ServiceManager& service_manager) {
     std::make_shared<SSL>()->InstallAsService(service_manager);
 }
diff --git a/src/core/hle/service/ssl/ssl.h b/src/core/hle/service/ssl/ssl.h
index 87538a6396..8fef130226 100644
--- a/src/core/hle/service/ssl/ssl.h
+++ b/src/core/hle/service/ssl/ssl.h
@@ -15,6 +15,7 @@ public:
 
 private:
     void CreateContext(Kernel::HLERequestContext& ctx);
+    void SetInterfaceVersion(Kernel::HLERequestContext& ctx);
 };
 
 /// Registers all SSL services with the specified service manager.