diff --git a/worthless/installer.py b/worthless/installer.py
index bc69027..2796ad3 100644
--- a/worthless/installer.py
+++ b/worthless/installer.py
@@ -457,25 +457,20 @@ class Installer:
 
     async def download_full_game(self, pre_download=False):
         game = await self._get_game(pre_download)
-        if not game.latest.path == "":
-            archive_name = game.latest.path.split("/")[-1]
-            if calculate_md5(self.temp_path.joinpath(archive_name)) != game.latest.md5:
-                raise RuntimeError("mismatch md5 for downloaded game archive")
-            return
         # Segment download
-        base_archive = None
-        for i, segment in enumerate(game.latest.segments):
+        # base_archive = None
+        for _, segment in enumerate(game.latest.segments):
             archive_name = segment["path"].split("/")[-1]
-            if i == 0:
-                base_archive = archive_name = Path(archive_name).stem  # Remove .001
-            if self.temp_path.joinpath(archive_name + ".downloaded").exists():
+            if self.temp_path.joinpath(archive_name + ".downloaded").exists() and self.temp_path.joinpath(archive_name).exists():
                 continue
             await self._download_file(segment["path"], archive_name)
-            if i != 0:
-                with open(self.temp_path.joinpath(base_archive), 'ab') as f:
-                    with open(self.temp_path.joinpath(archive_name), 'rb') as f2:
-                        f.write(f2.read())
-                self.temp_path.joinpath(archive_name).unlink()
+            if calculate_md5(self.temp_path.joinpath(archive_name)) != segment["md5"]:
+                raise RuntimeError(f"mismatch md5 for downloaded game archive: {archive_name}")
+            # if i != 0:
+            #     with open(self.temp_path.joinpath(base_archive), 'ab') as f:
+            #         with open(self.temp_path.joinpath(archive_name), 'rb') as f2:
+            #             shutil.copyfileobj(f2, f)
+            #     self.temp_path.joinpath(archive_name).unlink()
             self.temp_path.joinpath(archive_name + ".downloaded").touch()
             
 
@@ -489,13 +484,21 @@ class Installer:
     async def uninstall_game(self):
         await asyncio.to_thread(shutil.rmtree, self._gamedir, ignore_errors=True)
 
-    async def _extract_game_file(self, archive: str | Path | Path):
+    async def _extract_game_file(self, archive: str | Path):
         if isinstance(archive, str | Path):
             archive = Path(archive).resolve()
         if not archive.exists():
             raise FileNotFoundError(f"'{archive}' not found")
-        with zipfile.ZipFile(archive, 'r') as f:
-            await asyncio.to_thread(f.extractall, path=self._gamedir)
+        game_dir_str = str(self._gamedir)
+        if not game_dir_str.endswith("/"):
+            game_dir_str += "/"
+        print(f'-o"{game_dir_str}"')
+        proc = await asyncio.create_subprocess_shell(f'7z x {str(archive)} -o"{game_dir_str}"')
+        await proc.wait()
+        if proc.returncode != 0:
+            raise RuntimeError("Extracting failed")
+        # with zipfile.ZipFile(archive, 'r') as f:
+        #     await asyncio.to_thread(f.extractall, path=self._gamedir)
 
     async def apply_voiceover(self, voiceover_archive: str | Path):
         # Since Voiceover packages are unclear about diff package or full package