diff --git a/Core/FileSystems/DirectoryFileSystem.cpp b/Core/FileSystems/DirectoryFileSystem.cpp
index 3b90f5d9bb..9c39ece529 100644
--- a/Core/FileSystems/DirectoryFileSystem.cpp
+++ b/Core/FileSystems/DirectoryFileSystem.cpp
@@ -830,7 +830,7 @@ std::vector<PSPFileInfo> DirectoryFileSystem::GetDirListing(const std::string &p
 			entry.name = file.name;
 		}
 		if (hideISOFiles) {
-			if (endsWithNoCase(entry.name, ".cso") || endsWithNoCase(entry.name, ".iso")) {
+			if (endsWithNoCase(entry.name, ".cso") || endsWithNoCase(entry.name, ".iso") || endsWithNoCase(entry.name, ".chd")) {  // chd not really necessary, but let's hide them too.
 				// Workaround for DJ Max Portable, see compat.ini.
 				continue;
 			} else if (file.isDirectory) {
diff --git a/Core/Loaders.cpp b/Core/Loaders.cpp
index b304af72bd..f15a071397 100644
--- a/Core/Loaders.cpp
+++ b/Core/Loaders.cpp
@@ -92,9 +92,7 @@ IdentifiedFileType Identify_File(FileLoader *fileLoader, std::string *errorStrin
 			// maybe it also just happened to have that size, let's assume it's a PSP ISO and error out later if it's not.
 		}
 		return IdentifiedFileType::PSP_ISO;
-	} else if (extension == ".cso") {
-		return IdentifiedFileType::PSP_ISO;
-	} else if (extension == ".chd") {
+	} else if (extension == ".cso" || extension == ".chd") {
 		return IdentifiedFileType::PSP_ISO;
 	} else if (extension == ".ppst") {
 		return IdentifiedFileType::PPSSPP_SAVESTATE;
@@ -170,6 +168,11 @@ IdentifiedFileType Identify_File(FileLoader *fileLoader, std::string *errorStrin
 		// CISO are not used for many other kinds of ISO so let's just guess it's a PSP one and let it
 		// fail later...
 		return IdentifiedFileType::PSP_ISO;
+	} else if (!memcmp(&_id, "MCom", 4)) {
+		size_t readSize = fileLoader->ReadAt(4, 4, 1, &_id);
+		if (!memcmp(&_id, "prHD", 4)) {
+			return IdentifiedFileType::PSP_ISO;  // CHD file
+		}
 	}
 
 	if (id == 'FLE\x7F') {
diff --git a/Core/Util/GameManager.cpp b/Core/Util/GameManager.cpp
index 7e01533a40..ebbcb74b60 100644
--- a/Core/Util/GameManager.cpp
+++ b/Core/Util/GameManager.cpp
@@ -244,7 +244,7 @@ ZipFileContents DetectZipFileContents(struct zip *z, ZipFileInfo *info) {
 			} else {
 				INFO_LOG(HLE, "Wrong number of slashes (%i) in '%s'", slashCount, fn);
 			}
-		} else if (endsWith(zippedName, ".iso") || endsWith(zippedName, ".cso")) {
+		} else if (endsWith(zippedName, ".iso") || endsWith(zippedName, ".cso") || endsWith(zippedName, ".chd")) {
 			int slashCount = 0;
 			int slashLocation = -1;
 			countSlashes(zippedName, &slashLocation, &slashCount);
@@ -304,7 +304,7 @@ bool GameManager::InstallGame(const Path &url, const Path &fileName, bool delete
 
 	std::string extension = url.GetFileExtension();
 	// Examine the URL to guess out what we're installing.
-	if (extension == ".cso" || extension == ".iso") {
+	if (extension == ".cso" || extension == ".iso" || extension == ".chd") {
 		// It's a raw ISO or CSO file. We just copy it to the destination.
 		std::string shortFilename = url.GetFilename();
 		bool success = InstallRawISO(fileName, shortFilename, deleteAfter);
diff --git a/UWP/PPSSPP_UWPMain.cpp b/UWP/PPSSPP_UWPMain.cpp
index 5a2d210961..f90e96ae50 100644
--- a/UWP/PPSSPP_UWPMain.cpp
+++ b/UWP/PPSSPP_UWPMain.cpp
@@ -502,7 +502,7 @@ bool System_MakeRequest(SystemRequestType type, int requestId, const std::string
 		std::vector<std::string> supportedExtensions = {};
 		switch ((BrowseFileType)param3) {
 		case BrowseFileType::BOOTABLE:
-			supportedExtensions = { ".cso", ".bin", ".iso", ".elf", ".pbp", ".zip" };
+			supportedExtensions = { ".cso", ".iso", ".chd", ".elf", ".pbp", ".zip", ".prx", ".bin" };  // should .bin even be here?
 			break;
 		case BrowseFileType::INI:
 			supportedExtensions = { ".ini" };