diff --git a/legendary/cli.py b/legendary/cli.py
index c4d8185..3e4b539 100644
--- a/legendary/cli.py
+++ b/legendary/cli.py
@@ -272,7 +272,8 @@ class LegendaryCLI:
                                                           override_old_manifest=args.override_old_manifest,
                                                           override_base_url=args.override_base_url,
                                                           platform_override=args.platform_override,
-                                                          file_prefix_filter=args.file_prefix)
+                                                          file_prefix_filter=args.file_prefix,
+                                                          file_exclude_filter=args.file_exclude_prefix)
 
         # game is either up to date or hasn't changed, so we have nothing to do
         if not analysis.dl_size:
@@ -451,6 +452,8 @@ def main():
                                 type=str, help='Platform override for download (disables install)')
     install_parser.add_argument('--prefix', dest='file_prefix', action='store', metavar='<prefix>', type=str,
                                 help='Only fetch files whose path starts with <prefix> (case insensitive)')
+    install_parser.add_argument('--exclude', dest='file_exclude_prefix', action='store', metavar='<prefix>',
+                                type=str, help='Exclude files starting with <prefix> (case insensitive)')
 
     launch_parser.add_argument('--offline', dest='offline', action='store_true',
                                default=False, help='Skip login and launch game without online authentication')
diff --git a/legendary/core.py b/legendary/core.py
index dbb9fd0..9b432c8 100644
--- a/legendary/core.py
+++ b/legendary/core.py
@@ -355,9 +355,8 @@ class LegendaryCore:
                          force: bool = False, disable_patching: bool = False,
                          game_folder: str = '', override_manifest: str = '',
                          override_old_manifest: str = '', override_base_url: str = '',
-                         platform_override: str = '', file_prefix_filter: str = ''
-                         ) -> (DLManager, AnalysisResult, ManifestMeta):
-
+                         platform_override: str = '', file_prefix_filter: str = '',
+                         file_exclude_filter: str = '' ) -> (DLManager, AnalysisResult, ManifestMeta):
         # load old manifest
         old_manifest = None
 
@@ -430,7 +429,8 @@ class LegendaryCore:
                         max_shared_memory=max_shm * 1024 * 1024, max_workers=max_workers)
         anlres = dlm.run_analysis(manifest=new_manifest, old_manifest=old_manifest,
                                   patch=not disable_patching, resume=not force,
-                                  file_prefix_filter=file_prefix_filter)
+                                  file_prefix_filter=file_prefix_filter,
+                                  file_exclude_filter=file_exclude_filter)
 
         prereq = None
         if new_manifest.meta.prereq_ids:
diff --git a/legendary/downloader/manager.py b/legendary/downloader/manager.py
index 09c54cc..b2617b4 100644
--- a/legendary/downloader/manager.py
+++ b/legendary/downloader/manager.py
@@ -241,7 +241,8 @@ class DLManager(Process):
         self.log.info('Writer result handler quitting...')
 
     def run_analysis(self, manifest: Manifest, old_manifest: Manifest = None,
-                     patch=True, resume=True, file_prefix_filter=None) -> AnalysisResult:
+                     patch=True, resume=True, file_prefix_filter=None,
+                     file_exclude_filter=None) -> AnalysisResult:
         """
         Run analysis on manifest and old manifest (if not None) and return a result
         with a summary resources required in order to install the provided manifest.
@@ -251,12 +252,10 @@ class DLManager(Process):
         :param patch: Patch instead of redownloading the entire file
         :param resume: Continue based on resume file if it exists
         :param file_prefix_filter: Only download files that start with this prefix
+        :param file_exclude_filter: Exclude files with this prefix from download
         :return: AnalysisResult
         """
 
-        if file_prefix_filter:
-            file_prefix_filter = file_prefix_filter.lower()
-
         analysis_res = AnalysisResult()
         analysis_res.install_size = sum(fm.file_size for fm in manifest.file_manifest_list.elements)
         analysis_res.biggest_chunk = max(c.window_size for c in manifest.chunk_data_list.elements)
@@ -279,14 +278,29 @@ class DLManager(Process):
             except Exception as e:
                 self.log.warning(f'Reading resume file failed: {e!r}, continuing as normal...')
 
-        # if prefix has been set: mark all files that are not to be downloaded as unchanged (not removed)
-        if file_prefix_filter:
-            files_to_skip = set(i for i in mc.added | mc.changed if not i.lower().startswith(file_prefix_filter))
-            self.log.info(f'Found {len(files_to_skip)} files to skip based on prefix.')
+        # if include/exclude prefix has been set: mark all files that are not to be downloaded as unchanged
+        if file_exclude_filter:
+            file_exclude_filter = file_exclude_filter.lower()
+            files_to_skip = set(i for i in mc.added | mc.changed if i.lower().startswith(file_exclude_filter))
+            self.log.info(f'Found {len(files_to_skip)} files to skip based on exclude prefix.')
             mc.added -= files_to_skip
             mc.changed -= files_to_skip
             mc.unchanged |= files_to_skip
 
+        if file_prefix_filter:
+            file_prefix_filter = file_prefix_filter.lower()
+            files_to_skip = set(i for i in mc.added | mc.changed if not i.lower().startswith(file_prefix_filter))
+            self.log.info(f'Found {len(files_to_skip)} files to skip based on include prefix.')
+            mc.added -= files_to_skip
+            mc.changed -= files_to_skip
+            mc.unchanged |= files_to_skip
+
+        if file_prefix_filter or file_exclude_filter:
+            self.log.info(f'Remaining files after filtering: {len(mc.added) + len(mc.changed)}')
+            # correct install size after filtering
+            analysis_res.install_size = sum(fm.file_size for fm in manifest.file_manifest_list.elements
+                                            if fm.filename in mc.added)
+
         if mc.removed:
             analysis_res.removed = len(mc.removed)
             self.log.debug(f'{analysis_res.removed} removed files')