very simply version

game_backuper/__main__.py

@@ -0,0 +1,23 @@
+from game_backuper.config import Config
+from game_backuper.cml import Opts
+from game_backuper.db import Db
+from game_backuper.backuper import Backuper
+
+
+def main(cm=None):
+    if cm is None:
+        import sys
+        cm = sys.argv[1:]
+    cml = Opts(cm)
+    cfg = Config(cml.config_file)
+    db = Db(cfg.dest)
+    bk = Backuper(db, cfg, cml)
+    return bk.run()
+
+
+if __name__ == "__main__":
+    import sys
+    try:
+        sys.exit(main())
+    except Exception:
+        sys.exit(-1)