diff --git a/Source/Core/Common/CMakeLists.txt b/Source/Core/Common/CMakeLists.txt
index c7752540df..0dd69b6c43 100644
--- a/Source/Core/Common/CMakeLists.txt
+++ b/Source/Core/Common/CMakeLists.txt
@@ -82,6 +82,7 @@ add_library(common
   MemArena.h
   MemoryUtil.cpp
   MemoryUtil.h
+  MinizipUtil.h
   MsgHandler.cpp
   MsgHandler.h
   NandPaths.cpp
@@ -134,6 +135,7 @@ PUBLIC
   enet
   fmt::fmt
   ${MBEDTLS_LIBRARIES}
+  minizip
 
 PRIVATE
   ${CURL_LIBRARIES}
diff --git a/Source/Core/Common/Common.vcxproj b/Source/Core/Common/Common.vcxproj
index 4fd4119418..f1b56e99f1 100644
--- a/Source/Core/Common/Common.vcxproj
+++ b/Source/Core/Common/Common.vcxproj
@@ -139,6 +139,7 @@
     <ClInclude Include="MD5.h" />
     <ClInclude Include="MemArena.h" />
     <ClInclude Include="MemoryUtil.h" />
+    <ClInclude Include="MinizipUtil.h" />
     <ClInclude Include="MsgHandler.h" />
     <ClInclude Include="NandPaths.h" />
     <ClInclude Include="Network.h" />
diff --git a/Source/Core/Common/Common.vcxproj.filters b/Source/Core/Common/Common.vcxproj.filters
index 5849e34f66..6a0261032f 100644
--- a/Source/Core/Common/Common.vcxproj.filters
+++ b/Source/Core/Common/Common.vcxproj.filters
@@ -59,6 +59,7 @@
     <ClInclude Include="Matrix.h" />
     <ClInclude Include="MemArena.h" />
     <ClInclude Include="MemoryUtil.h" />
+    <ClInclude Include="MinizipUtil.h" />
     <ClInclude Include="MsgHandler.h" />
     <ClInclude Include="NandPaths.h" />
     <ClInclude Include="Network.h" />
diff --git a/Source/Core/Common/MinizipUtil.h b/Source/Core/Common/MinizipUtil.h
new file mode 100644
index 0000000000..8d8bc7d692
--- /dev/null
+++ b/Source/Core/Common/MinizipUtil.h
@@ -0,0 +1,42 @@
+// Copyright 2019 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <algorithm>
+
+#include <minizip/unzip.h>
+
+#include "Common/CommonTypes.h"
+#include "Common/ScopeGuard.h"
+
+namespace Common
+{
+// Reads all of the current file. destination must be big enough to fit the whole file.
+template <typename ContiguousContainer>
+bool ReadFileFromZip(unzFile file, ContiguousContainer* destination)
+{
+  const u32 MAX_BUFFER_SIZE = 65535;
+
+  if (unzOpenCurrentFile(file) != UNZ_OK)
+    return false;
+
+  Common::ScopeGuard guard{[&] { unzCloseCurrentFile(file); }};
+
+  u32 bytes_to_go = static_cast<u32>(destination->size());
+  while (bytes_to_go > 0)
+  {
+    const int bytes_read =
+        unzReadCurrentFile(file, &(*destination)[destination->size() - bytes_to_go],
+                           std::min(bytes_to_go, MAX_BUFFER_SIZE));
+
+    if (bytes_read < 0)
+      return false;
+
+    bytes_to_go -= static_cast<u32>(bytes_read);
+  }
+
+  return true;
+}
+}  // namespace Common
diff --git a/Source/Core/DiscIO/CMakeLists.txt b/Source/Core/DiscIO/CMakeLists.txt
index ca5fdd3ddd..bfeab923fb 100644
--- a/Source/Core/DiscIO/CMakeLists.txt
+++ b/Source/Core/DiscIO/CMakeLists.txt
@@ -45,6 +45,7 @@ add_library(discio
 
 target_link_libraries(discio
 PRIVATE
+  minizip
   pugixml
   ZLIB::ZLIB
 )
diff --git a/Source/Core/DiscIO/VolumeVerifier.cpp b/Source/Core/DiscIO/VolumeVerifier.cpp
index b0d4e8c3c5..de100bfb76 100644
--- a/Source/Core/DiscIO/VolumeVerifier.cpp
+++ b/Source/Core/DiscIO/VolumeVerifier.cpp
@@ -16,6 +16,7 @@
 
 #include <mbedtls/md5.h>
 #include <mbedtls/sha1.h>
+#include <minizip/unzip.h>
 #include <pugixml.hpp>
 #include <zlib.h>
 
@@ -25,7 +26,9 @@
 #include "Common/CommonTypes.h"
 #include "Common/FileUtil.h"
 #include "Common/Logging/Log.h"
+#include "Common/MinizipUtil.h"
 #include "Common/MsgHandler.h"
+#include "Common/ScopeGuard.h"
 #include "Common/StringUtil.h"
 #include "Common/Swap.h"
 #include "Core/IOS/Device.h"
@@ -46,9 +49,9 @@ namespace DiscIO
 void RedumpVerifier::Start(const Volume& volume)
 {
   if (volume.GetVolumeType() == Platform::GameCubeDisc)
-    m_dat_filename = "gamecube.dat";
+    m_platform = "gc";
   else if (volume.GetVolumeType() == Platform::WiiDisc)
-    m_dat_filename = "wii.dat";
+    m_platform = "wii";
   else
     m_result.status = Status::Error;
 
@@ -62,7 +65,35 @@ void RedumpVerifier::Start(const Volume& volume)
   m_disc_number = volume.GetDiscNumber().value_or(0);
   m_size = volume.GetSize();
 
-  m_future = std::async(std::launch::async, [this] { return ScanXML(); });
+  m_future = std::async(std::launch::async, [this] { return ScanDatfile(ReadDatfile()); });
+}
+
+std::vector<u8> RedumpVerifier::ReadDatfile()
+{
+  const std::string path = File::GetUserPath(D_REDUMPCACHE_IDX) + DIR_SEP + m_platform + ".zip";
+
+  unzFile file = unzOpen(path.c_str());
+  if (!file)
+    return {};
+
+  Common::ScopeGuard file_guard{[&] { unzClose(file); }};
+
+  // Check that the zip file contains exactly one file
+  if (unzGoToFirstFile(file) != UNZ_OK)
+    return {};
+  if (unzGoToNextFile(file) != UNZ_END_OF_LIST_OF_FILE)
+    return {};
+
+  // Read the file
+  if (unzGoToFirstFile(file) != UNZ_OK)
+    return {};
+  unz_file_info file_info;
+  unzGetCurrentFileInfo(file, &file_info, nullptr, 0, nullptr, 0, nullptr, 0);
+  std::vector<u8> data(file_info.uncompressed_size);
+  if (!Common::ReadFileFromZip(file, &data))
+    return {};
+
+  return data;
 }
 
 static u8 ParseHexDigit(char c)
@@ -93,18 +124,13 @@ static std::vector<u8> ParseHash(const char* str)
   return hash;
 }
 
-std::vector<RedumpVerifier::PotentialMatch> RedumpVerifier::ScanXML()
+std::vector<RedumpVerifier::PotentialMatch> RedumpVerifier::ScanDatfile(const std::vector<u8>& data)
 {
-  const std::string path = File::GetUserPath(D_REDUMPCACHE_IDX) + DIR_SEP + m_dat_filename;
-
   pugi::xml_document doc;
+  if (!doc.load_buffer(data.data(), data.size()))
   {
-    std::string data;
-    if (!File::ReadFileToString(path, data) || !doc.load_buffer(data.data(), data.size()))
-    {
-      m_result = {Status::Error, Common::GetStringT("Failed to parse Redump.org data")};
-      return {};
-    }
+    m_result = {Status::Error, Common::GetStringT("Failed to parse Redump.org data")};
+    return {};
   }
 
   std::vector<PotentialMatch> potential_matches;
diff --git a/Source/Core/DiscIO/VolumeVerifier.h b/Source/Core/DiscIO/VolumeVerifier.h
index 0b908811f5..d10c5c97ff 100644
--- a/Source/Core/DiscIO/VolumeVerifier.h
+++ b/Source/Core/DiscIO/VolumeVerifier.h
@@ -71,9 +71,10 @@ private:
     Hashes<std::vector<u8>> hashes;
   };
 
-  std::vector<PotentialMatch> ScanXML();
+  std::vector<u8> ReadDatfile();
+  std::vector<PotentialMatch> ScanDatfile(const std::vector<u8>& data);
 
-  std::string m_dat_filename;
+  std::string m_platform;
   std::string m_game_id;
   u16 m_revision;
   u8 m_disc_number;
diff --git a/Source/Core/UICommon/ResourcePack/ResourcePack.cpp b/Source/Core/UICommon/ResourcePack/ResourcePack.cpp
index 24c6f7c76e..b0587f3ca5 100644
--- a/Source/Core/UICommon/ResourcePack/ResourcePack.cpp
+++ b/Source/Core/UICommon/ResourcePack/ResourcePack.cpp
@@ -10,6 +10,7 @@
 
 #include "Common/FileSearch.h"
 #include "Common/FileUtil.h"
+#include "Common/MinizipUtil.h"
 #include "Common/ScopeGuard.h"
 #include "Common/StringUtil.h"
 
@@ -20,35 +21,6 @@ namespace ResourcePack
 {
 constexpr char TEXTURE_PATH[] = "Load/Textures/";
 
-// Since minzip doesn't provide a way to unzip a file of a length > 65535, we have to implement
-// this ourselves
-template <typename ContiguousContainer>
-static bool ReadCurrentFileUnlimited(unzFile file, ContiguousContainer& destination)
-{
-  const u32 MAX_BUFFER_SIZE = 65535;
-
-  if (unzOpenCurrentFile(file) != UNZ_OK)
-    return false;
-
-  Common::ScopeGuard guard{[&] { unzCloseCurrentFile(file); }};
-
-  auto bytes_to_go = static_cast<u32>(destination.size());
-  while (bytes_to_go > 0)
-  {
-    const int bytes_read = unzReadCurrentFile(file, &destination[destination.size() - bytes_to_go],
-                                              std::min(bytes_to_go, MAX_BUFFER_SIZE));
-
-    if (bytes_read < 0)
-    {
-      return false;
-    }
-
-    bytes_to_go -= static_cast<u32>(bytes_read);
-  }
-
-  return true;
-}
-
 ResourcePack::ResourcePack(const std::string& path) : m_path(path)
 {
   auto file = unzOpen(path.c_str());
@@ -72,7 +44,7 @@ ResourcePack::ResourcePack(const std::string& path) : m_path(path)
   unzGetCurrentFileInfo(file, &manifest_info, nullptr, 0, nullptr, 0, nullptr, 0);
 
   std::string manifest_contents(manifest_info.uncompressed_size, '\0');
-  if (!ReadCurrentFileUnlimited(file, manifest_contents))
+  if (!Common::ReadFileFromZip(file, &manifest_contents))
   {
     m_valid = false;
     m_error = "Failed to read manifest.json";
@@ -96,7 +68,7 @@ ResourcePack::ResourcePack(const std::string& path) : m_path(path)
 
     m_logo_data.resize(logo_info.uncompressed_size);
 
-    if (!ReadCurrentFileUnlimited(file, m_logo_data))
+    if (!Common::ReadFileFromZip(file, &m_logo_data))
     {
       m_valid = false;
       m_error = "Failed to read logo.png";
@@ -208,7 +180,7 @@ bool ResourcePack::Install(const std::string& path)
     unzGetCurrentFileInfo(file, &texture_info, nullptr, 0, nullptr, 0, nullptr, 0);
 
     std::vector<char> data(texture_info.uncompressed_size);
-    if (!ReadCurrentFileUnlimited(file, data))
+    if (!Common::ReadFileFromZip(file, &data))
     {
       m_error = "Failed to read texture " + texture;
       return false;