diff --git a/Readme.md b/Readme.md
index cf9cd42..5eab20c 100644
--- a/Readme.md
+++ b/Readme.md
@@ -23,7 +23,13 @@ This uses the same API the itchio app uses to download the files. If you have 2F
 python -m itchiodl.downloader --api-key=KEYHERE --jobs=4
 
 # via setup-tools entry point
+itch-download -k KEYHERE
+
+# download with multiple threads
 itch-download -k KEYHERE -j 4
+
+# only download osx or cross platform downloads
+itch-download -p osx
 ```
 
 ## Add All Games in a bundle to your library
diff --git a/itchiodl/downloader/__main__.py b/itchiodl/downloader/__main__.py
index 7770a93..d23ac28 100644
--- a/itchiodl/downloader/__main__.py
+++ b/itchiodl/downloader/__main__.py
@@ -15,6 +15,11 @@ def main():
         "--api-key",
         help="Use API key instead of username/password")
 
+    parser.add_argument(
+        "-p",
+        "--platform",
+        help="Platform to download for (default: all), will accept values like 'windows', 'linux', 'osx' and android")
+
     parser.add_argument(
         "-j",
         "--jobs",
@@ -35,7 +40,7 @@ def main():
 
     lib = itchiodl.Library(l, args.jobs)
     lib.load_games()
-    lib.download_library()
+    lib.download_library(args.platform)
 
 
 if __name__ == "__main__":
diff --git a/itchiodl/game.py b/itchiodl/game.py
index 963505f..a255b3e 100644
--- a/itchiodl/game.py
+++ b/itchiodl/game.py
@@ -34,7 +34,7 @@ class Game:
         for d in j["uploads"]:
             self.downloads.append(d)
 
-    def download(self, token):
+    def download(self, token, platform):
         if os.path.exists(f"{self.publisher_slug}/{self.game_slug}.json"):
             print(f"Skipping Game {self.name}")
             return
@@ -48,6 +48,10 @@ class Game:
             os.mkdir(f"{self.publisher_slug}/{self.game_slug}")
 
         for d in self.downloads:
+            if platform is not None and d["traits"] and f"p_{platform}" not in d["traits"]:
+                print(f"Skipping {self.name} for platform {d['traits']}")
+                continue
+
             file = d['filename'] or d['display_name'] or d['id']
             path = f"{self.publisher_slug}/{self.game_slug}"
             if os.path.exists(f"{path}/{file}"):
diff --git a/itchiodl/library.py b/itchiodl/library.py
index 5859df2..c459670 100644
--- a/itchiodl/library.py
+++ b/itchiodl/library.py
@@ -32,7 +32,7 @@ class Library:
                 break
             page += 1
 
-    def download_library(self):
+    def download_library(self, platform=None):
         with ThreadPoolExecutor(max_workers=self.jobs) as executor:
-            def dl(g): return g.download(self.login)
+            def dl(g): return g.download(self.login, platform)
             executor.map(dl, self.games)