diff --git a/src/clew/clew.py b/src/clew/clew.py
index dffee11..fadf7d1 100644
--- a/src/clew/clew.py
+++ b/src/clew/clew.py
@@ -20,6 +20,7 @@ def parse_args(argv: list[str]) -> argparse.Namespace:
     )
     parser.add_argument(
         "--game-root",
+        required=True,
         type=Path,
         help="Game installation root to scan.",
     )
@@ -35,9 +36,9 @@ def parse_args(argv: list[str]) -> argparse.Namespace:
         help="Replace Clew-managed output directories.",
     )
     parser.add_argument(
-        "--dump-renpy-objects",
+        "--no-renpy-object-dump",
         action="store_true",
-        help="Dump compiled Ren'Py scripts from output/extracted/ to output/ast-raw/.",
+        help="Skip dumping compiled Ren'Py scripts from output/extracted/ to output/ast-raw/.",
     )
     return parser.parse_args(argv)
 
@@ -156,21 +157,17 @@ def dump_renpy_objects(output_root: Path, overwrite: bool) -> None:
 
 
 def run(args: argparse.Namespace) -> None:
+    game_root = args.game_root.resolve()
     output_root = resolve_output_root(args.output_root)
 
-    if args.game_root is not None:
-        game_root = args.game_root.resolve()
-        if not game_root.is_dir():
-            LOG.critical(f"game root is not a directory: {game_root}")
-            raise SystemExit(2)
-
-        extracted = get_output_directory(output_root, "extracted")
-        extract_game_files(game_root, extracted)
-    elif not args.dump_renpy_objects:
-        LOG.critical("missing --game-root unless --dump-renpy-objects is set")
+    if not game_root.is_dir():
+        LOG.critical(f"game root is not a directory: {game_root}")
         raise SystemExit(2)
 
-    if args.dump_renpy_objects:
+    extracted = get_output_directory(output_root, "extracted")
+    extract_game_files(game_root, extracted)
+
+    if not args.no_renpy_object_dump:
         dump_renpy_objects(output_root, args.overwrite)