diff --git a/vollerei/abc/launcher/game.py b/vollerei/abc/launcher/game.py
index d83941d..6256132 100644
--- a/vollerei/abc/launcher/game.py
+++ b/vollerei/abc/launcher/game.py
@@ -87,6 +87,28 @@ class GameABC(ABC):
         """
         pass
 
+    def repair_files(
+        self,
+        files: list[PathLike],
+        pre_download: bool = False,
+        game_info: resource.Game = None,
+    ) -> None:
+        """
+        Repairs multiple game files.
+
+        This will automatically handle backup and restore the file if the repair
+        fails.
+
+        This method is not multi-threaded, so it may take a while to repair
+        multiple files.
+
+        Args:
+            file (PathLike): The file to repair.
+            pre_download (bool): Whether to get the pre-download version.
+                Defaults to False.
+        """
+        pass
+
     def get_version(self) -> tuple[int, int, int]:
         """
         Get the game version
diff --git a/vollerei/common/functions.py b/vollerei/common/functions.py
index 2b43216..7e73627 100644
--- a/vollerei/common/functions.py
+++ b/vollerei/common/functions.py
@@ -154,7 +154,7 @@ def repair_game(
     # ThreadPoolExecutor, probably better for this use case.
     game_info = game.get_remote_game(pre_download=pre_download)
     pkg_version_file = game.path.joinpath("pkg_version")
-    pkg_version = []
+    pkg_version: dict[str, dict[str, str]] = {}
     if not pkg_version_file.is_file():
         try:
             game.repair_file(game.path.joinpath("pkg_version"), game_info=game_info)
@@ -167,31 +167,61 @@ def repair_game(
             line = line.strip()
             if not line:
                 continue
-            pkg_version.append(json.loads(line))
+            line_json = json.loads(line)
+            pkg_version[line_json["remoteName"]] = {
+                "md5": line_json["md5"],
+                "fileSize": line_json["fileSize"],
+            }
+    read_needed_files: list[Path] = []
+    target_files: list[Path] = []
     repair_executor = concurrent.futures.ThreadPoolExecutor()
-    for file in pkg_version:
+    for file in game.path.rglob("*"):
+        # Ignore webCaches folder (because it's user data)
+        if file.is_dir():
+            continue
+        if "webCaches" in str(file):
+            continue
 
-        def repair(target_file, game_info):
+        def verify(file_path: Path):
+            nonlocal target_files
+            nonlocal pkg_version
+            relative_path = file_path.relative_to(game.path)
+            relative_path_str = str(relative_path).replace("\\", "/")
+            # print(relative_path_str)
+            # Wtf mihoyo, you build this game for Windows and then use Unix path separator :moyai:
             try:
-                game.repair_file(target_file, game_info=game_info)
-            except Exception as e:
-                print(f"Failed to repair {target_file['remoteName']}: {e}")
+                target_file = pkg_version.pop(relative_path_str)
+                if target_file:
+                    with file_path.open("rb", buffering=0) as f:
+                        file_hash = hashlib.file_digest(f, "md5").hexdigest()
+                    if file_hash == target_file["md5"]:
+                        return
+                    print(
+                        f"Hash mismatch for {target_file['remoteName']} ({file_hash}; expected {target_file['md5']})"
+                    )
+                    target_files.append(file_path)
+            except KeyError:
+                # File not found in pkg_version
+                read_needed_files.append(file_path)
 
-        def verify_and_repair(target_file, game_info):
-            file_path = game.path.joinpath(target_file["remoteName"])
-            if not file_path.is_file():
-                print(f"File {target_file['remoteName']} not found, repairing...")
-                repair(file_path, game_info)
-                return
-            with file_path.open("rb", buffering=0) as f:
-                file_hash = hashlib.file_digest(f, "md5").hexdigest()
-            if file_hash != target_file["md5"]:
-                print(
-                    f"Hash mismatch for {target_file['remoteName']} ({file_hash}; expected {target_file['md5']})"
-                )
-                repair(file_path, game_info)
-
-        # Single-threaded for now
-        # verify_and_repair(file, game_info)
-        repair_executor.submit(verify_and_repair, file, game_info)
+        repair_executor.submit(verify, file)
     repair_executor.shutdown(wait=True)
+    for file in read_needed_files:
+        try:
+            with file.open("rb", buffering=0) as f:
+                # We only need to read 4 bytes to see if the file is readable or not
+                f.read(4)
+        except Exception:
+            print(f"File {file=} is corrupted.")
+            target_files.append(file)
+    # value not used for now
+    for key, _ in pkg_version.items():
+        target_file = game.path.joinpath(key)
+        if target_file.is_file():
+            continue
+        print(f"{key} not found.")
+        target_files.append(target_file)
+    if not target_files:
+        return
+    print("Begin repairing files...")
+    game.repair_files(target_files, game_info=game_info)
diff --git a/vollerei/hsr/launcher/game.py b/vollerei/hsr/launcher/game.py
index 48595e0..6c2669c 100644
--- a/vollerei/hsr/launcher/game.py
+++ b/vollerei/hsr/launcher/game.py
@@ -1,3 +1,4 @@
+import concurrent.futures
 from configparser import ConfigParser
 from hashlib import md5
 from io import IOBase
@@ -349,6 +350,40 @@ class Game(GameABC):
                 return diff
         return None
 
+    def _repair_file(self, file: PathLike, game: resource.Game) -> None:
+        # .replace("\\", "/") is needed because Windows uses backslashes :)
+        relative_file = file.relative_to(self._path)
+        url = (
+            game.latest.decompressed_path + "/" + str(relative_file).replace("\\", "/")
+        )
+        # Backup the file
+        if file.exists():
+            backup_file = file.with_suffix(file.suffix + ".bak")
+            if backup_file.exists():
+                backup_file.unlink()
+            file.rename(backup_file)
+            dest_file = file.with_suffix("")
+        else:
+            dest_file = file
+        try:
+            # Download the file
+            temp_file = self.cache.joinpath(relative_file)
+            dest_file.parent.mkdir(parents=True, exist_ok=True)
+            print(f"Downloading repair file {url} to {temp_file}")
+            download(url, temp_file, overwrite=True, stream=True)
+            # Move the file
+            copyfile(temp_file, dest_file)
+            print("OK")
+        except Exception as e:
+            # Restore the backup
+            print("Failed", e)
+            if file.exists():
+                file.rename(file.with_suffix(""))
+            raise e
+        # Delete the backup
+        if file.exists():
+            file.unlink(missing_ok=True)
+
     def repair_file(
         self,
         file: PathLike,
@@ -377,36 +412,42 @@ class Game(GameABC):
             game = game_info
         if game.latest.decompressed_path is None:
             raise ScatteredFilesNotAvailableError("Scattered files are not available.")
-        # .replace("\\", "/") is needed because Windows uses backslashes :)
-        relative_file = file.relative_to(self._path)
-        url = (
-            game.latest.decompressed_path + "/" + str(relative_file).replace("\\", "/")
-        )
-        # Backup the file
-        if file.exists():
-            file.rename(file.with_suffix(file.suffix + ".bak"))
-            dest_file = file.with_suffix("")
+        self._repair_file(file, game=game)
+
+    def repair_files(
+        self,
+        files: list[PathLike],
+        pre_download: bool = False,
+        game_info: resource.Game = None,
+    ) -> None:
+        """
+        Repairs multiple game files.
+
+        This will automatically handle backup and restore the file if the repair
+        fails.
+
+        Args:
+            file (PathLike): The file to repair.
+            pre_download (bool): Whether to get the pre-download version.
+                Defaults to False.
+        """
+        if not self.is_installed():
+            raise GameNotInstalledError("Game is not installed.")
+        files_path = [Path(file) for file in files]
+        for file in files_path:
+            if not file.is_relative_to(self._path):
+                raise ValueError("File is not in the game folder.")
+        if not game_info:
+            game = self.get_remote_game(pre_download=pre_download)
         else:
-            dest_file = file
-        try:
-            # Download the file
-            temp_file = self.cache.joinpath(relative_file)
-            dest_file.parent.mkdir(parents=True, exist_ok=True)
-            print(f"Downloading repair file {url} to {temp_file}")
-            download(url, temp_file, overwrite=True, stream=True)
-            # Move the file
-            copyfile(temp_file, dest_file)
-            print("OK")
-        except Exception as e:
-            # Restore the backup
-            print("Failed", e)
-            if file.exists():
-                file.rename(file.with_suffix(""))
-            raise e
-        else:
-            # Delete the backup
-            if file.exists():
-                file.unlink(missing_ok=True)
+            game = game_info
+        if game.latest.decompressed_path is None:
+            raise ScatteredFilesNotAvailableError("Scattered files are not available.")
+        executor = concurrent.futures.ThreadPoolExecutor()
+        for file in files_path:
+            executor.submit(self._repair_file, file, game=game)
+            # self._repair_file(file, game=game)
+        executor.shutdown(wait=True)
 
     def repair_game(self) -> None:
         """