diff --git a/.gitmodules b/.gitmodules
index 8d0922e5c..2bf62e6b1 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -16,9 +16,6 @@
 [submodule "third_party/catch"]
 	path = third_party/catch
 	url = https://github.com/catchorg/Catch2.git
-[submodule "third_party/gflags"]
-	path = third_party/gflags
-	url = https://github.com/benvanik/gflags.git
 [submodule "third_party/premake-core"]
 	path = third_party/premake-core
 	url = https://github.com/xenia-project/premake-core.git
diff --git a/premake5.lua b/premake5.lua
index ca0e6dadc..c8990f421 100644
--- a/premake5.lua
+++ b/premake5.lua
@@ -192,30 +192,9 @@ filter("platforms:Windows")
     "shlwapi",
   })
 
--- Create scratch/ path and dummy flags file if needed.
+-- Create scratch/ path
 if not os.isdir("scratch") then
   os.mkdir("scratch")
-  local flags_file = io.open("scratch/flags.txt", "w")
-  flags_file:write("# Put flags, one on each line.\n")
-  flags_file:write("# Launch executables with --flags_file=scratch/flags.txt\n")
-  flags_file:write("\n")
-  flags_file:write("--cpu=x64\n")
-  flags_file:write("#--enable_haswell_instructions=false\n")
-  flags_file:write("\n")
-  flags_file:write("--debug\n")
-  flags_file:write("#--protect_zero=false\n")
-  flags_file:write("\n")
-  flags_file:write("#--mute\n")
-  flags_file:write("\n")
-  flags_file:write("--fast_stdout\n")
-  flags_file:write("#--flush_stdout=false\n")
-  flags_file:write("\n")
-  flags_file:write("#--vsync=false\n")
-  flags_file:write("#--trace_gpu_prefix=scratch/gpu/gpu_trace_\n")
-  flags_file:write("#--trace_gpu_stream\n")
-  flags_file:write("#--disable_framebuffer_readback\n")
-  flags_file:write("\n")
-  flags_file:close()
 end
 
 solution("xenia")
@@ -229,12 +208,10 @@ solution("xenia")
   end
   configurations({"Checked", "Debug", "Release"})
 
-  -- Include third party files first so they don't have to deal with gflags.
   include("third_party/aes_128.lua")
   include("third_party/capstone.lua")
   include("third_party/discord-rpc.lua")
   include("third_party/cxxopts.lua")
-  include("third_party/gflags.lua")
   include("third_party/cpptoml.lua")
   include("third_party/glew.lua")
   include("third_party/glslang-spirv.lua")
diff --git a/src/xenia/app/premake5.lua b/src/xenia/app/premake5.lua
index 2db66ffeb..874ed20e4 100644
--- a/src/xenia/app/premake5.lua
+++ b/src/xenia/app/premake5.lua
@@ -11,7 +11,6 @@ project("xenia-app")
     "aes_128",
     "capstone",
     "discord-rpc",
-    "gflags",
     "glew",
     "glslang-spirv",
     "imgui",
@@ -45,9 +44,6 @@ project("xenia-app")
     "XBYAK_NO_OP_NAMES",
     "XBYAK_ENABLE_OMITTED_OPERAND",
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   local_platform_files()
   files({
     "xenia_main.cc",
@@ -89,6 +85,5 @@ project("xenia-app")
     if not os.isfile(user_file) then
       debugdir(project_root)
       debugargs({
-        "--flagfile=scratch/flags.txt",
       })
     end
diff --git a/src/xenia/apu/nop/premake5.lua b/src/xenia/apu/nop/premake5.lua
index 21eb100e8..8c16c8a65 100644
--- a/src/xenia/apu/nop/premake5.lua
+++ b/src/xenia/apu/nop/premake5.lua
@@ -12,7 +12,4 @@ project("xenia-apu-nop")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   local_platform_files()
diff --git a/src/xenia/apu/premake5.lua b/src/xenia/apu/premake5.lua
index 17ecd8834..a3284fe0e 100644
--- a/src/xenia/apu/premake5.lua
+++ b/src/xenia/apu/premake5.lua
@@ -14,7 +14,6 @@ project("xenia-apu")
   defines({
   })
   includedirs({
-    project_root.."/third_party/gflags/src",
     project_root.."/third_party/libav/",
   })
   local_platform_files()
diff --git a/src/xenia/apu/xaudio2/premake5.lua b/src/xenia/apu/xaudio2/premake5.lua
index 57bd6e1ef..9198a9a4a 100644
--- a/src/xenia/apu/xaudio2/premake5.lua
+++ b/src/xenia/apu/xaudio2/premake5.lua
@@ -12,7 +12,4 @@ project("xenia-apu-xaudio2")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   local_platform_files()
diff --git a/src/xenia/base/main_win.cc b/src/xenia/base/main_win.cc
index 6ecbba83a..3c373a7df 100644
--- a/src/xenia/base/main_win.cc
+++ b/src/xenia/base/main_win.cc
@@ -89,7 +89,6 @@ int Main() {
   auto entry_info = xe::GetEntryInfo();
 
   // Convert command line to an argv-like format so we can share code/use
-  // gflags.
   auto command_line = GetCommandLineW();
   int argc;
   wchar_t** argv = CommandLineToArgvW(command_line, &argc);
@@ -97,7 +96,7 @@ int Main() {
     return 1;
   }
 
-  // Convert all args to narrow, as gflags doesn't support wchar.
+  // Convert all args to narrow, as cxxopts doesn't support wchar.
   int argca = argc;
   char** argva = reinterpret_cast<char**>(alloca(sizeof(char*) * argca));
   for (int n = 0; n < argca; n++) {
diff --git a/src/xenia/base/premake5.lua b/src/xenia/base/premake5.lua
index 960a6500c..3459f66ad 100644
--- a/src/xenia/base/premake5.lua
+++ b/src/xenia/base/premake5.lua
@@ -7,9 +7,6 @@ project("xenia-base")
   language("C++")
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   local_platform_files()
   removefiles({"main_*.cc"})
   files({
diff --git a/src/xenia/base/testing/premake5.lua b/src/xenia/base/testing/premake5.lua
index e432d7ec4..9570a76f5 100644
--- a/src/xenia/base/testing/premake5.lua
+++ b/src/xenia/base/testing/premake5.lua
@@ -2,9 +2,6 @@ project_root = "../../../.."
 include(project_root.."/tools/build")
 
 test_suite("xenia-base-tests", project_root, ".", {
-  includedirs = {
-    project_root.."/third_party/gflags/src",
-  },
   links = {
     "xenia-base",
   },
diff --git a/src/xenia/cpu/backend/x64/premake5.lua b/src/xenia/cpu/backend/x64/premake5.lua
index b0d397a2c..ebbc19765 100644
--- a/src/xenia/cpu/backend/x64/premake5.lua
+++ b/src/xenia/cpu/backend/x64/premake5.lua
@@ -27,6 +27,5 @@ project("xenia-cpu-backend-x64")
 
   includedirs({
     project_root.."/third_party/capstone/include",
-    project_root.."/third_party/gflags/src",
   })
   local_platform_files()
diff --git a/src/xenia/cpu/ppc/testing/premake5.lua b/src/xenia/cpu/ppc/testing/premake5.lua
index d2d5549cd..e318d8db5 100644
--- a/src/xenia/cpu/ppc/testing/premake5.lua
+++ b/src/xenia/cpu/ppc/testing/premake5.lua
@@ -11,7 +11,6 @@ project("xenia-cpu-ppc-tests")
     "xenia-cpu-backend-x64",
     "xenia-cpu",
     "xenia-base",
-    "gflags",
     "capstone", -- cpu-backend-x64
     "mspack",
   })
@@ -22,15 +21,11 @@ project("xenia-cpu-ppc-tests")
   files({
     "*.s",
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   filter("files:*.s")
     flags({"ExcludeFromBuild"})
   filter("platforms:Windows")
     debugdir(project_root)
     debugargs({
-      "--flagfile=scratch/flags.txt",
       "2>&1",
       "1>scratch/stdout-testing.txt",
     })
@@ -46,7 +41,6 @@ project("xenia-cpu-ppc-nativetests")
   language("C++")
   links({
     "xenia-base",
-    "gflags",
   })
   files({
     "ppc_testing_native_main.cc",
@@ -59,9 +53,6 @@ project("xenia-cpu-ppc-nativetests")
   filter("files:instr_*.s", "files:seq_*.s")
     flags({"ExcludeFromBuild"})
   filter({})
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   buildoptions({
     "-Wa,-mregnames",  -- Tell GAS to accept register names.
   })
diff --git a/src/xenia/cpu/premake5.lua b/src/xenia/cpu/premake5.lua
index 96a41f6e0..748602659 100644
--- a/src/xenia/cpu/premake5.lua
+++ b/src/xenia/cpu/premake5.lua
@@ -12,7 +12,6 @@ project("xenia-cpu")
   })
   includedirs({
     project_root.."/third_party/llvm/include",
-    project_root.."/third_party/gflags/src",
   })
   local_platform_files()
   local_platform_files("backend")
diff --git a/src/xenia/cpu/testing/premake5.lua b/src/xenia/cpu/testing/premake5.lua
index 30e60604f..a3c2b8566 100644
--- a/src/xenia/cpu/testing/premake5.lua
+++ b/src/xenia/cpu/testing/premake5.lua
@@ -2,9 +2,6 @@ project_root = "../../../.."
 include(project_root.."/tools/build")
 
 test_suite("xenia-cpu-tests", project_root, ".", {
-  includedirs = {
-    project_root.."/third_party/gflags/src",
-  },
   links = {
     "capstone",
     "xenia-base",
diff --git a/src/xenia/debug/ui/premake5.lua b/src/xenia/debug/ui/premake5.lua
index e631f7f5b..84ca9bbd8 100644
--- a/src/xenia/debug/ui/premake5.lua
+++ b/src/xenia/debug/ui/premake5.lua
@@ -16,7 +16,6 @@ project("xenia-debug-ui")
   defines({
   })
   includedirs({
-    project_root.."/third_party/gflags/src",
     project_root.."/third_party/yaml-cpp/include/",
   })
   local_platform_files()
diff --git a/src/xenia/gpu/null/premake5.lua b/src/xenia/gpu/null/premake5.lua
index 4d902b992..0b4ed0e66 100644
--- a/src/xenia/gpu/null/premake5.lua
+++ b/src/xenia/gpu/null/premake5.lua
@@ -15,7 +15,4 @@ project("xenia-gpu-null")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   local_platform_files()
diff --git a/src/xenia/gpu/premake5.lua b/src/xenia/gpu/premake5.lua
index d0ce85820..c541eb547 100644
--- a/src/xenia/gpu/premake5.lua
+++ b/src/xenia/gpu/premake5.lua
@@ -19,7 +19,6 @@ project("xenia-gpu")
   })
   includedirs({
     project_root.."/third_party/spirv-tools/external/include",
-    project_root.."/third_party/gflags/src",
   })
   local_platform_files()
   -- local_platform_files("spirv")
@@ -31,7 +30,6 @@ project("xenia-gpu-shader-compiler")
   kind("ConsoleApp")
   language("C++")
   links({
-    "gflags",
     "glslang-spirv",
     "spirv-tools",
     "xenia-base",
@@ -40,9 +38,6 @@ project("xenia-gpu-shader-compiler")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   files({
     "shader_compiler_main.cc",
     "../base/main_"..platform_suffix..".cc",
@@ -54,7 +49,6 @@ project("xenia-gpu-shader-compiler")
     if not os.isfile(user_file) then
       debugdir(project_root)
       debugargs({
-        "--flagfile=scratch/flags.txt",
         "2>&1",
         "1>scratch/stdout-shader-compiler.txt",
       })
diff --git a/src/xenia/gpu/vulkan/premake5.lua b/src/xenia/gpu/vulkan/premake5.lua
index 82b843b59..2be22502e 100644
--- a/src/xenia/gpu/vulkan/premake5.lua
+++ b/src/xenia/gpu/vulkan/premake5.lua
@@ -17,9 +17,6 @@ project("xenia-gpu-vulkan")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   local_platform_files()
   files({
     "shaders/bin/*.h",
@@ -34,7 +31,6 @@ project("xenia-gpu-vulkan-trace-viewer")
   links({
     "aes_128",
     "capstone",
-    "gflags",
     "glslang-spirv",
     "imgui",
     "libavcodec",
@@ -62,9 +58,6 @@ project("xenia-gpu-vulkan-trace-viewer")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   files({
     "vulkan_trace_viewer_main.cc",
     "../../base/main_"..platform_suffix..".cc",
@@ -91,7 +84,6 @@ project("xenia-gpu-vulkan-trace-viewer")
     if not os.isfile(user_file) then
       debugdir(project_root)
       debugargs({
-        "--flagfile=scratch/flags.txt",
         "2>&1",
         "1>scratch/stdout-trace-viewer.txt",
       })
@@ -105,7 +97,6 @@ project("xenia-gpu-vulkan-trace-dump")
   links({
     "aes_128",
     "capstone",
-    "gflags",
     "glslang-spirv",
     "imgui",
     "libavcodec",
@@ -133,9 +124,6 @@ project("xenia-gpu-vulkan-trace-dump")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   files({
     "vulkan_trace_dump_main.cc",
     "../../base/main_"..platform_suffix..".cc",
@@ -156,7 +144,6 @@ project("xenia-gpu-vulkan-trace-dump")
     if not os.isfile(user_file) then
       debugdir(project_root)
       debugargs({
-        "--flagfile=scratch/flags.txt",
         "2>&1",
         "1>scratch/stdout-trace-dump.txt",
       })
diff --git a/src/xenia/hid/nop/premake5.lua b/src/xenia/hid/nop/premake5.lua
index b953b1773..53fefaee5 100644
--- a/src/xenia/hid/nop/premake5.lua
+++ b/src/xenia/hid/nop/premake5.lua
@@ -12,7 +12,4 @@ project("xenia-hid-nop")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   local_platform_files()
diff --git a/src/xenia/hid/premake5.lua b/src/xenia/hid/premake5.lua
index ea7b6afbf..37f96f414 100644
--- a/src/xenia/hid/premake5.lua
+++ b/src/xenia/hid/premake5.lua
@@ -11,9 +11,6 @@ project("xenia-hid")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   local_platform_files()
   removefiles({"*_demo.cc"})
 
@@ -23,7 +20,6 @@ project("xenia-hid-demo")
   kind("WindowedApp")
   language("C++")
   links({
-    "gflags",
     "glew",
     "imgui",
     "volk",
@@ -37,9 +33,6 @@ project("xenia-hid-demo")
     "GLEW_STATIC=1",
     "GLEW_MX=1",
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   files({
     "hid_demo.cc",
     "../base/main_"..platform_suffix..".cc",
diff --git a/src/xenia/hid/winkey/premake5.lua b/src/xenia/hid/winkey/premake5.lua
index d0edd8fb6..0e3b86580 100644
--- a/src/xenia/hid/winkey/premake5.lua
+++ b/src/xenia/hid/winkey/premake5.lua
@@ -13,7 +13,4 @@ project("xenia-hid-winkey")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   local_platform_files()
diff --git a/src/xenia/hid/xinput/premake5.lua b/src/xenia/hid/xinput/premake5.lua
index 506ea5e25..6247cf98c 100644
--- a/src/xenia/hid/xinput/premake5.lua
+++ b/src/xenia/hid/xinput/premake5.lua
@@ -12,7 +12,4 @@ project("xenia-hid-xinput")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   local_platform_files()
diff --git a/src/xenia/kernel/premake5.lua b/src/xenia/kernel/premake5.lua
index 0aba1a30e..808dc8899 100644
--- a/src/xenia/kernel/premake5.lua
+++ b/src/xenia/kernel/premake5.lua
@@ -16,9 +16,6 @@ project("xenia-kernel")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   recursive_platform_files()
   files({
     "debug_visualizers.natvis",
diff --git a/src/xenia/premake5.lua b/src/xenia/premake5.lua
index 1d674f198..b403f42f9 100644
--- a/src/xenia/premake5.lua
+++ b/src/xenia/premake5.lua
@@ -11,7 +11,4 @@ project("xenia-core")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   files({"*.h", "*.cc"})
diff --git a/src/xenia/ui/premake5.lua b/src/xenia/ui/premake5.lua
index 6fe5ebfc8..c5dbd84af 100644
--- a/src/xenia/ui/premake5.lua
+++ b/src/xenia/ui/premake5.lua
@@ -11,8 +11,5 @@ project("xenia-ui")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   local_platform_files()
   removefiles({"*_demo.cc"})
diff --git a/src/xenia/ui/spirv/premake5.lua b/src/xenia/ui/spirv/premake5.lua
index 423ad7bb6..9988a051a 100644
--- a/src/xenia/ui/spirv/premake5.lua
+++ b/src/xenia/ui/spirv/premake5.lua
@@ -14,7 +14,6 @@ project("xenia-ui-spirv")
   defines({
   })
   includedirs({
-    project_root.."/third_party/gflags/src",
     project_root.."/third_party/spirv-tools/external/include",
   })
   local_platform_files()
diff --git a/src/xenia/ui/vulkan/premake5.lua b/src/xenia/ui/vulkan/premake5.lua
index 8246ef249..5d04b98d2 100644
--- a/src/xenia/ui/vulkan/premake5.lua
+++ b/src/xenia/ui/vulkan/premake5.lua
@@ -14,7 +14,6 @@ project("xenia-ui-vulkan")
   defines({
   })
   includedirs({
-    project_root.."/third_party/gflags/src",
     project_root.."/third_party/vulkan/",
   })
   local_platform_files()
@@ -29,7 +28,6 @@ project("xenia-ui-window-vulkan-demo")
   kind("WindowedApp")
   language("C++")
   links({
-    "gflags",
     "imgui",
     "volk",
     "xenia-base",
@@ -40,7 +38,6 @@ project("xenia-ui-window-vulkan-demo")
   defines({
   })
   includedirs({
-    project_root.."/third_party/gflags/src",
     project_root.."/third_party/vulkan/",
   })
   files({
diff --git a/src/xenia/vfs/premake5.lua b/src/xenia/vfs/premake5.lua
index ea174e3e0..fc8b4a545 100644
--- a/src/xenia/vfs/premake5.lua
+++ b/src/xenia/vfs/premake5.lua
@@ -11,9 +11,6 @@ project("xenia-vfs")
   })
   defines({
   })
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
   recursive_platform_files()
   removefiles({"vfs_dump.cc"})
 
@@ -22,14 +19,10 @@ project("xenia-vfs-dump")
   kind("ConsoleApp")
   language("C++")
   links({
-    "gflags",
     "xenia-base",
     "xenia-vfs",
   })
   defines({})
-  includedirs({
-    project_root.."/third_party/gflags/src",
-  })
 
   files({
     "vfs_dump.cc",
diff --git a/third_party/gflags b/third_party/gflags
deleted file mode 160000
index 78b15171a..000000000
--- a/third_party/gflags
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 78b15171a7fce5815df58a919ab593ce80222028
diff --git a/third_party/gflags.lua b/third_party/gflags.lua
deleted file mode 100644
index edb9a4eb6..000000000
--- a/third_party/gflags.lua
+++ /dev/null
@@ -1,41 +0,0 @@
-group("third_party")
-project("gflags")
-  uuid("e319da87-75ed-4517-8f65-bd25e9cc02a3")
-  kind("StaticLib")
-  language("C++")
-
-  -- These win32-specific overrides must come before others.
-  filter("platforms:Windows")
-    defines({
-      "PATH_SEPARATOR=%%27\\\\%%27",
-    })
-    includedirs({
-      "gflags/src/windows",
-    })
-  filter({})
-
-  defines({
-    "GFLAGS_DLL_DECL=",
-    "GFLAGS_DLL_DEFINE_FLAG=",
-    "GFLAGS_DLL_DECLARE_FLAG=",
-    "_LIB",
-  })
-  includedirs({
-    "gflags/src",
-  })
-  files({
-    "gflags/src/gflags.cc",
-    "gflags/src/gflags_completions.cc",
-    "gflags/src/gflags_reporting.cc",
-    "gflags/src/mutex.h",
-    "gflags/src/util.h",
-  })
-  filter("platforms:Windows")
-    files({
-      "gflags/src/windows/config.h",
-      "gflags/src/windows/gflags/gflags.h",
-      "gflags/src/windows/gflags/gflags_completions.h",
-      "gflags/src/windows/gflags/gflags_declare.h",
-      "gflags/src/windows/port.cc",
-      "gflags/src/windows/port.h",
-    })
diff --git a/tools/build/scripts/test_suite.lua b/tools/build/scripts/test_suite.lua
index 78e46aa4f..096968f7c 100644
--- a/tools/build/scripts/test_suite.lua
+++ b/tools/build/scripts/test_suite.lua
@@ -25,7 +25,6 @@ local function combined_test_suite(test_suite_name, project_root, base_path, con
       project_root.."/"..build_bin,
     }))
     links(merge_arrays(config["links"], {
-      "gflags",
     }))
     files({
       project_root.."/"..build_tools_src.."/test_suite_main.cc",
@@ -50,7 +49,6 @@ local function split_test_suite(test_suite_name, project_root, base_path, config
         project_root.."/"..build_bin,
       }))
       links(merge_arrays(config["links"], {
-        "gflags",
       }))
       files({
         project_root.."/"..build_tools_src.."/test_suite_main.cc",