diff --git a/Externals/SlippiLib/SlippiGame.h b/Externals/SlippiLib/SlippiGame.h
index e338999347..1bb6693e89 100644
--- a/Externals/SlippiLib/SlippiGame.h
+++ b/Externals/SlippiLib/SlippiGame.h
@@ -109,6 +109,7 @@ namespace Slippi {
 
   class SlippiGame {
   public:
+    static std::unique_ptr<SlippiGame> FromFile(std::string path);
     bool AreSettingsLoaded();
     bool DoesFrameExist(int32_t frame);
     std::array<uint8_t, 4> GetVersion();
@@ -118,6 +119,7 @@ namespace Slippi {
     GameSettings* GetSettings();
     bool DoesPlayerExist(int8_t port);
     bool IsProcessingComplete();
+
   private:
     Game game;
     std::unique_ptr<std::ifstream> file;
@@ -136,7 +138,5 @@ namespace Slippi {
     bool isProcessingComplete = false;
 
     void processData();
-
-    static std::unique_ptr<SlippiGame> FromFile(std::string path);
   };
 }
diff --git a/Source/Core/Core/CMakeLists.txt b/Source/Core/Core/CMakeLists.txt
index 88dca0f749..7a77a30044 100644
--- a/Source/Core/Core/CMakeLists.txt
+++ b/Source/Core/Core/CMakeLists.txt
@@ -213,6 +213,8 @@ add_library(core
   HW/EXI/EXI_DeviceMemoryCard.h
   HW/EXI/EXI_DeviceMic.cpp
   HW/EXI/EXI_DeviceMic.h
+	HW/EXI/EXI_DeviceSlippi.cpp
+  HW/EXI/EXI_DeviceSlippi.h
   HW/GCKeyboard.cpp
   HW/GCKeyboard.h
   HW/GCKeyboardEmu.cpp
@@ -580,7 +582,7 @@ PUBLIC
   videoogl
   videosoftware
   videovulkan
-  Slippi
+  SlippiLib
   vcdcom
   vcddec
   vcdenc
diff --git a/Source/Core/Core/HW/EXI/EXI_DeviceSlippi.cpp b/Source/Core/Core/HW/EXI/EXI_DeviceSlippi.cpp
index 06f0ca0d16..cce3ea664e 100644
--- a/Source/Core/Core/HW/EXI/EXI_DeviceSlippi.cpp
+++ b/Source/Core/Core/HW/EXI/EXI_DeviceSlippi.cpp
@@ -2,39 +2,42 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
-#include "Core/Debugger/Debugger_SymbolMap.h"
 
-#include <SlippiGame.h>
-#include "Core/Slippi/SlippiReplayComm.h"
-#include "Core/Slippi/SlippiPlayback.h"
 #include <semver/include/semver200.h>
 #include <utility> // std::move
-
+#include <algorithm>
 
 #include "Common/CommonPaths.h"
 #include "Common/CommonTypes.h"
+
 #include "Common/Logging/Log.h"
 #include "Common/MemoryUtil.h"
 #include "Common/MsgHandler.h"
 #include "Common/StringUtil.h"
 #include "Common/Thread.h"
-#include "Core/HW/Memmap.h"
+#include "Common/Version.h"
 
-#include "Core/NetPlayClient.h"
 #include "Core/Core.h"
+#include "Core/ConfigManager.h"
 #include "Core/CoreTiming.h"
-
-#include "Core/HW/EXI_DeviceSlippi.h"
+#include "Core/Debugger/Debugger_SymbolMap.h"
+#include "Core/HW/EXI/EXI_DeviceSlippi.h"
+#include "Core/HW/Memmap.h"
 #include "Core/HW/SystemTimers.h"
+#include "Core/NetPlayClient.h"
+#include "Core/Slippi/SlippiReplayComm.h"
+#include "Core/Slippi/SlippiPlayback.h"
+
+
 #include "Core/State.h"
 
 // Not clean but idk a better way atm
 //#ifndef LINUX_LOCAL_DEV
-#include "DolphinWX/Frame.h"
-#include "DolphinWX/Main.h"
+//#include "DolphinWX/Frame.h"
+//#include "DolphinWX/Main.h"
 //#endif
 
-namespace ExpansionInterface {
+
 #define FRAME_INTERVAL 900
 #define SLEEP_TIME_MS 8
 #define WRITE_FILE_SLEEP_TIME_MS 85
@@ -42,6 +45,8 @@ namespace ExpansionInterface {
 //#define LOCAL_TESTING
 //#define CREATE_DIFF_FILES
 
+namespace ExpansionInterface {
+
 static std::unordered_map<u8, std::string> slippi_names;
 static std::unordered_map<u8, std::string> slippi_connect_codes;
 
@@ -249,22 +254,6 @@ std::unordered_map<u8, std::string> CEXISlippi::getNetplayNames()
     names = slippi_names;
   }
 
-  else if (netplay_client && netplay_client->IsConnected())
-  {
-    auto netplayPlayers = netplay_client->GetPlayers();
-    for (auto it = netplayPlayers.begin(); it != netplayPlayers.end(); ++it)
-    {
-      auto player = *it;
-      u8 portIndex = netplay_client->FindPlayerPad(player);
-      if (portIndex < 0)
-      {
-        continue;
-      }
-
-      names[portIndex] = player->name;
-    }
-  }
-
   return names;
 }
 
@@ -1058,7 +1047,7 @@ void CEXISlippi::prepareGeckoList()
   geckoList.insert(geckoList.end(), { 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 });
 }
 
-void CEXISlippi::prepareCharacterFrameData(Slippi::FrameData* frame, u8 port, u8 isFollower)
+void CEXISlippi::prepareCharacterFrameData(std::shared_ptr<Slippi::FrameData> frame, u8 port, u8 isFollower)
 {
   std::unordered_map<uint8_t, Slippi::PlayerFrameData> source;
   source = isFollower ? frame->followers : frame->players;
@@ -1107,7 +1096,7 @@ bool CEXISlippi::checkFrameFullyFetched(s32 frameIndex)
   if (!doesFrameExist)
     return false;
 
-  Slippi::FrameData* frame = m_current_game->GetFrame(frameIndex);
+  std::shared_ptr<Slippi::FrameData> frame = m_current_game->GetFrame(frameIndex);
 
   // This flag is set to true after a post frame update has been received. At that point
   // we know we have received all of the input data for the frame
@@ -1258,7 +1247,7 @@ void CEXISlippi::prepareFrameData(u8* payload)
   m_read_queue.push_back(requestResultCode);
 
   // Get frame
-  Slippi::FrameData* frame = m_current_game->GetFrame(frameIndex);
+  std::shared_ptr<Slippi::FrameData> frame = m_current_game->GetFrame(frameIndex);
   if (commSettings.rollbackDisplayMethod != "off")
   {
     auto previousFrame = m_current_game->GetFrameAt(frameSeqIdx - 1);
@@ -1362,7 +1351,7 @@ void CEXISlippi::prepareIsStockSteal(u8* payload)
   }
 
   // Load the data from this frame into the read buffer
-  Slippi::FrameData* frame = m_current_game->GetFrame(frameIndex);
+  std::shared_ptr<Slippi::FrameData> frame = m_current_game->GetFrame(frameIndex);
   auto players = frame->players;
 
   u8 playerIsBack = players.count(playerIndex) ? 1 : 0;
@@ -1441,7 +1430,7 @@ void CEXISlippi::handleOnlineInputs(u8* payload)
   prepareOpponentInputs(payload);
 }
 
-bool CEXISlippi::shouldSkipOnlineFrame(int32_t frame)
+bool CEXISlippi::shouldSkipOnlineFrame(s32 frame)
 {
   auto status = slippi_netplay->GetSlippiConnectStatus();
   bool connectionFailed = status == SlippiNetplayClient::SlippiConnectStatus::NET_CONNECT_STATUS_FAILED;
@@ -1891,7 +1880,7 @@ u16 CEXISlippi::getRandomStage()
   // use a random number to select an index but idk the generator was giving a lot
   // of the same stage (same index) many times in a row or so it seemed to I figured
   // this can't hurt
-  std::random_shuffle(stagesToConsider.begin(), stagesToConsider.end());
+  std::shuffle(stagesToConsider.begin(), stagesToConsider.end(), generator);
 
   // Get random stage
   int randIndex = generator() % stagesToConsider.size();
@@ -1984,11 +1973,11 @@ void CEXISlippi::logMessageFromGame(u8* payload)
   if (payload[0] == 0)
   {
     // The first byte indicates whether to log the time or not
-    GENERIC_LOG(LogTypes::SLIPPI, (LogTypes::LOG_LEVELS)payload[1], "%s", (char*)& payload[2]);
+    GENERIC_LOG(Common::Log::SLIPPI, (Common::Log::LOG_LEVELS)payload[1], "%s", (char*)& payload[2]);
   }
   else
   {
-    GENERIC_LOG(LogTypes::SLIPPI, (LogTypes::LOG_LEVELS)payload[1], "%s: %llu", (char*)& payload[2],
+    GENERIC_LOG(Common::Log::SLIPPI, (Common::Log::LOG_LEVELS)payload[1], "%s: %llu", (char*)& payload[2],
       Common::Timer::GetTimeUs());
   }
 }
@@ -1999,7 +1988,7 @@ void CEXISlippi::handleLogInRequest()
   if (!logInRes)
   {
     //#ifndef LINUX_LOCAL_DEV
-    main_frame->LowerRenderWindow();
+    //main_frame->LowerRenderWindow();  SLIPPITODO: figure out replacement. 
     //#endif
     user->OpenLogInPage();
     user->ListenForLogIn();
@@ -2016,7 +2005,7 @@ void CEXISlippi::handleUpdateAppRequest()
 #ifdef __APPLE__
   CriticalAlertT("Automatic updates are not available for macOS, please update manually.");
 #else
-  main_frame->LowerRenderWindow();
+  // main_frame->LowerRenderWindow(); SLIPPITODO: figure out replacement // mainwindow hide render widget
   user->UpdateApp();
   main_frame->DoExit();
 #endif
@@ -2034,7 +2023,7 @@ void CEXISlippi::prepareOnlineStatus()
   {
     // Check if we have the latest version, and if not, indicate we need to update
     version::Semver200_version latestVersion(userInfo.latestVersion);
-    version::Semver200_version currentVersion(scm_slippi_semver_str);
+    version::Semver200_version currentVersion(Common::scm_slippi_semver_str);
 
     appState = latestVersion > currentVersion ? 2 : 1;
   }
@@ -2092,7 +2081,7 @@ void CEXISlippi::DMAWrite(u32 _uAddr, u32 _uSize)
   if (memPtr == nullptr)
   {
     NOTICE_LOG(SLIPPI, "DMA Write was passed an invalid address: %x", _uAddr);
-    Dolphin_Debugger::PrintCallstack(LogTypes::LOG_TYPE::SLIPPI, LogTypes::LOG_LEVELS::LNOTICE);
+    Dolphin_Debugger::PrintCallstack(Common::Log::SLIPPI, Common::Log::LNOTICE);
     m_read_queue.clear();
     return;
   }
diff --git a/Source/Core/Core/HW/EXI/EXI_DeviceSlippi.h b/Source/Core/Core/HW/EXI/EXI_DeviceSlippi.h
index f3e4a14fa0..603a0ff59f 100644
--- a/Source/Core/Core/HW/EXI/EXI_DeviceSlippi.h
+++ b/Source/Core/Core/HW/EXI/EXI_DeviceSlippi.h
@@ -13,6 +13,7 @@
 #include "Core/Slippi/SlippiGameFileLoader.h"
 #include "Core/Slippi/SlippiMatchmaking.h"
 #include "Core/Slippi/SlippiNetplay.h"
+#include "Core/Slippi/SlippiPlayback.h"
 #include "Core/Slippi/SlippiReplayComm.h"
 #include "Core/Slippi/SlippiSavestate.h"
 #include "Core/Slippi/SlippiUser.h"
@@ -165,7 +166,7 @@ namespace ExpansionInterface
     // replay playback stuff
     void prepareGameInfo(u8* payload);
     void prepareGeckoList();
-    void prepareCharacterFrameData(Slippi::FrameData* frame, u8 port, u8 isFollower);
+    void prepareCharacterFrameData(std::shared_ptr<Slippi::FrameData> frame, u8 port, u8 isFollower);
     void prepareFrameData(u8* payload);
     void prepareIsStockSteal(u8* payload);
     void prepareIsFileReady();
diff --git a/Source/Core/Core/Slippi/SlippiGameFileLoader.cpp b/Source/Core/Core/Slippi/SlippiGameFileLoader.cpp
index 4cbd157569..4eb8a38711 100644
--- a/Source/Core/Core/Slippi/SlippiGameFileLoader.cpp
+++ b/Source/Core/Core/Slippi/SlippiGameFileLoader.cpp
@@ -2,10 +2,10 @@
 
 #include "Common/Logging/Log.h"
 #include "Common/FileUtil.h"
+#include "Common/File.h"
 #include "Core/Boot/Boot.h"
 #include "Core/Core.h"
 #include "Core/ConfigManager.h"
-#include "Core/Common/FileUtil.h"
 
 std::string getFilePath(std::string fileName)
 {
@@ -40,7 +40,7 @@ void ReadFileToBuffer(std::string& fileName, std::vector<u8>& buf)
   auto fileSize = file.GetSize();
   buf.resize(fileSize);
   size_t bytes_read;
-  file.ReadArray<u8>(vector->data(), std::min<u64>(file.GetSize(), vector->size()), &bytes_read);  
+  file.ReadArray<u8>(buf.data(), std::min<u64>(file.GetSize(), buf.size()), &bytes_read);  
 }
 
 u32 SlippiGameFileLoader::LoadFile(std::string fileName, std::string& data)
diff --git a/Source/Core/Core/Slippi/SlippiMatchmaking.cpp b/Source/Core/Core/Slippi/SlippiMatchmaking.cpp
index 6fd41dfe06..d4cdfe5126 100644
--- a/Source/Core/Core/Slippi/SlippiMatchmaking.cpp
+++ b/Source/Core/Core/Slippi/SlippiMatchmaking.cpp
@@ -1,5 +1,6 @@
 #include "SlippiMatchmaking.h"
 #include "Common/Common.h"
+#include "Common/Version.h"
 #include "Common/ENetUtil.h"
 #include "Common/Logging/Log.h"
 #include "Common/StringUtil.h"
@@ -27,7 +28,7 @@ SlippiMatchmaking::SlippiMatchmaking(SlippiUser* user)
   m_client = nullptr;
   m_server = nullptr;
 
-  MM_HOST = scm_slippi_semver_str.find("dev") == std::string::npos ? MM_HOST_PROD : MM_HOST_DEV;
+  MM_HOST = Common::scm_slippi_semver_str.find("dev") == std::string::npos ? MM_HOST_PROD : MM_HOST_DEV;
 
   generator = std::default_random_engine(Common::Timer::GetTimeMs());
 }
@@ -287,7 +288,7 @@ void SlippiMatchmaking::startMatchmaking()
   request["type"] = MmMessageType::CREATE_TICKET;
   request["user"] = { {"uid", userInfo.uid}, {"playKey", userInfo.playKey} };
   request["search"] = { {"mode", m_searchSettings.mode}, {"connectCode", connectCodeBuf} };
-  request["appVersion"] = scm_slippi_semver_str;
+  request["appVersion"] = Common::scm_slippi_semver_str;
   sendMessage(request);
 
   // Get response from server
@@ -388,8 +389,7 @@ void SlippiMatchmaking::handleMatchmaking()
 
 void SlippiMatchmaking::handleConnecting()
 {
-  std::vector<std::string> ipParts;
-  SplitString(m_oppIp, ':', ipParts);
+  std::vector<std::string> ipParts = SplitString(m_oppIp, ':');
 
   // Is host is now used to specify who the decider is
   auto client = std::make_unique<SlippiNetplayClient>(ipParts[0], std::stoi(ipParts[1]), m_hostPort, m_isHost);
diff --git a/Source/Core/Core/Slippi/SlippiPlayback.cpp b/Source/Core/Core/Slippi/SlippiPlayback.cpp
index dc3726fcb6..4049a08ce0 100644
--- a/Source/Core/Core/Slippi/SlippiPlayback.cpp
+++ b/Source/Core/Core/Slippi/SlippiPlayback.cpp
@@ -7,6 +7,7 @@
 
 #include "Common/Logging/Log.h"
 #include "Core/Core.h"
+#include "Core/ConfigManager.h"
 #include "Core/HW/EXI/EXI_DeviceSlippi.h"
 #include "Core/NetPlayClient.h"
 #include "Core/State.h"
@@ -128,7 +129,7 @@ void SlippiPlaybackStatus::resetPlayback()
   inSlippiPlayback = false;
 }
 
-void SlippiPlaybackStatus::processInitialState(std::vector<u8>& iState)
+void SlippiPlaybackStatus::processInitialState()
 {
   INFO_LOG(SLIPPI, "saving iState");
   State::SaveToBuffer(iState);
@@ -161,7 +162,7 @@ void SlippiPlaybackStatus::SavestateThread()
 
     if (!inSlippiPlayback && isStartFrame)
     {
-      processInitialState(iState);
+      processInitialState();
       inSlippiPlayback = true;
     }
     else if (!hasStateBeenProcessed && !isStartFrame)
@@ -194,8 +195,8 @@ void SlippiPlaybackStatus::SeekThread()
       if (replayCommSettings.mode == "queue")
         clearWatchSettingsStartEnd();
 
-      bool paused = (Core::GetState() == Core::CORE_PAUSE);
-      Core::SetState(Core::CORE_PAUSE);
+      bool paused = (Core::GetState() == Core::State::Paused);
+      Core::SetState(Core::State::Paused);
 
       u32 jumpInterval = 300; // 5 seconds;
 
diff --git a/Source/Core/Core/Slippi/SlippiPlayback.h b/Source/Core/Core/Slippi/SlippiPlayback.h
index f7f0e892a7..085f94f8e8 100644
--- a/Source/Core/Core/Slippi/SlippiPlayback.h
+++ b/Source/Core/Core/Slippi/SlippiPlayback.h
@@ -37,7 +37,7 @@ public:
 private:
   void SavestateThread(void);
   void SeekThread(void);
-  void processInitialState(std::vector<u8>& iState);
+  void processInitialState();
   void clearWatchSettingsStartEnd();
 
   std::unordered_map<int32_t, std::shared_future<std::string>>
diff --git a/Source/Core/Core/Slippi/SlippiReplayComm.h b/Source/Core/Core/Slippi/SlippiReplayComm.h
index acc750a6b3..8e142cec19 100644
--- a/Source/Core/Core/Slippi/SlippiReplayComm.h
+++ b/Source/Core/Core/Slippi/SlippiReplayComm.h
@@ -1,10 +1,12 @@
 #pragma once
 
-#include <SlippiGame.h>
 #include <queue>
 #include <string>
-
 #include <nlohmann/json.hpp>
+#include <SlippiGame.h>
+
+#include <Common/CommonTypes.h>
+
 using json = nlohmann::json;
 
 class SlippiReplayComm
diff --git a/Source/Core/Core/Slippi/SlippiSavestate.cpp b/Source/Core/Core/Slippi/SlippiSavestate.cpp
index aea018cb9c..57d7a2bd72 100644
--- a/Source/Core/Core/Slippi/SlippiSavestate.cpp
+++ b/Source/Core/Core/Slippi/SlippiSavestate.cpp
@@ -3,13 +3,13 @@
 #include "Common/MemoryUtil.h"
 #include "Core/HW/AudioInterface.h"
 #include "Core/HW/DSP.h"
-#include "Core/HW/DVDInterface.h"
-#include "Core/HW/EXI.h"
+#include "Core/HW/DVD/DVDInterface.h"
+#include "Core/HW/EXI/EXI.h"
 #include "Core/HW/GPFifo.h"
 #include "Core/HW/HW.h"
 #include "Core/HW/Memmap.h"
 #include "Core/HW/ProcessorInterface.h"
-#include "Core/HW/SI.h"
+#include "Core/HW/SI/SI.h"
 #include "Core/HW/VideoInterface.h"
 #include <vector>
 
diff --git a/Source/Core/Core/Slippi/SlippiUser.cpp b/Source/Core/Core/Slippi/SlippiUser.cpp
index 493f0433d8..479717cf44 100644
--- a/Source/Core/Core/Slippi/SlippiUser.cpp
+++ b/Source/Core/Core/Slippi/SlippiUser.cpp
@@ -149,13 +149,13 @@ void SlippiUser::UpdateFile()
 void SlippiUser::UpdateApp()
 {
 #ifdef _WIN32
-  auto isoPath = SConfig::GetInstance().m_strFilename;
+  auto isoPath = SConfig::GetInstance().m_strBootROM;
 
   std::string path = File::GetExeDirectory() + "/dolphin-slippi-tools.exe";
   std::string echoMsg = "echo Starting update process. If nothing happen after a few "
     "minutes, you may need to update manually from https://slippi.gg/netplay ...";
   std::string command = "start /b cmd /c " + echoMsg + " && \"" + path + "\" app-update -launch -iso \"" + isoPath + "\"";
-  WARN_LOG(SLIPPI, "Executing app update command: %s", command);
+  WARN_LOG(SLIPPI, "Executing app update command: %s", command.c_str());
   RunSystemCommand(command);
 #elif defined(__APPLE__)
 #else