diff --git a/lutris/gui/dialogs/__init__.py b/lutris/gui/dialogs/__init__.py
index a7bbe9358..2ff8b58b2 100644
--- a/lutris/gui/dialogs/__init__.py
+++ b/lutris/gui/dialogs/__init__.py
@@ -324,7 +324,6 @@ class LutrisInitDialog(Gtk.Dialog):
         self.label = Gtk.Label(_("Checking for runtime updates, please wait…"))
         vbox.add(self.label)
         self.progress = Gtk.ProgressBar(visible=True)
-        self.progress.set_pulse_step(0.1)
         vbox.add(self.progress)
         self.get_content_area().add(vbox)
         self.progress_timeout = GLib.timeout_add(125, self.show_progress)
@@ -335,13 +334,13 @@ class LutrisInitDialog(Gtk.Dialog):
         AsyncCall(self.run_init, self.init_cb)
 
     def show_progress(self):
-        self.progress.pulse()
+        self.progress.set_fraction(self.runtime_updater.percentage_completed())
         return True
 
     def run_init(self):
         self.runtime_updater.update_runtimes()
 
-    def init_cb(self, _result, error):
+    def init_cb(self, _result, error: Exception):
         if error:
             ErrorDialog(error, parent=self)
         self.destroy()
diff --git a/lutris/runtime.py b/lutris/runtime.py
index 12297e829..ecea3fe9a 100644
--- a/lutris/runtime.py
+++ b/lutris/runtime.py
@@ -34,11 +34,12 @@ class Runtime:
 
     """Class for manipulating runtime folders"""
 
-    def __init__(self, name, updater):
+    def __init__(self, name: str, updater) -> None:
         self.name = name
         self.updater = updater
         self.versioned = False  # Versioned runtimes keep 1 version per folder
         self.version = None
+        self.download_progress: float = 0
 
     @property
     def local_runtime_path(self):
@@ -91,7 +92,7 @@ class Runtime:
             return False
         return True
 
-    def download(self, remote_runtime_info):
+    def download(self, remote_runtime_info: dict):
         """Downloads a runtime locally"""
         url = remote_runtime_info["url"]
         self.versioned = remote_runtime_info["versioned"]
@@ -164,7 +165,7 @@ class Runtime:
             self.on_downloaded(None)
             return False
 
-        downloader.check_progress()
+        self.download_progress = downloader.check_progress()
         if downloader.state == downloader.COMPLETED:
             self.on_downloaded(downloader.dest)
             return False
@@ -276,7 +277,13 @@ class RuntimeUpdater:
                 if self.cancelled:
                     return
 
-    def _populate_component_downloaders(self):
+    def percentage_completed(self) -> float:
+        if not self.downloaders:
+            return 0
+
+        return sum(downloader.progress_fraction for downloader in self.downloaders.values()) / len(self.downloaders)
+
+    def _populate_component_downloaders(self) -> int:
         """Launch the update process"""
         if RUNTIME_DISABLED:
             logger.warning("Runtime disabled, not updating it.")
diff --git a/lutris/util/downloader.py b/lutris/util/downloader.py
index 9dedf64d1..ae7d8a4da 100644
--- a/lutris/util/downloader.py
+++ b/lutris/util/downloader.py
@@ -32,11 +32,11 @@ class Downloader:
         COMPLETED
     ) = list(range(5))
 
-    def __init__(self, url, dest, overwrite=False, referer=None, cookies=None):
-        self.url = url
-        self.dest = dest
+    def __init__(self, url: str, dest: str, overwrite: bool = False, referer=None, cookies=None) -> None:
+        self.url: str = url
+        self.dest: str = dest
         self.cookies = cookies
-        self.overwrite = overwrite
+        self.overwrite: bool = overwrite
         self.referer = referer
         self.stop_request = None
         self.thread = None
@@ -44,22 +44,22 @@ class Downloader:
         # Read these after a check_progress()
         self.state = self.INIT
         self.error = None
-        self.downloaded_size = 0  # Bytes
-        self.full_size = 0  # Bytes
-        self.progress_fraction = 0
-        self.progress_percentage = 0
+        self.downloaded_size: int = 0  # Bytes
+        self.full_size: int = 0  # Bytes
+        self.progress_fraction: float = 0
+        self.progress_percentage: float = 0
         self.speed = 0
         self.average_speed = 0
-        self.time_left = "00:00:00"  # Based on average speed
-        self.last_size = 0
-        self.last_check_time = 0
+        self.time_left: str = "00:00:00"  # Based on average speed
+        self.last_size: int = 0
+        self.last_check_time: float = 0.0
         self.last_speeds = []
         self.speed_check_time = 0
         self.time_left_check_time = 0
         self.file_pointer = None
         self.progress_event = threading.Event()
 
-    def __str__(self):
+    def __repr__(self):
         return "downloader for %s" % self.url
 
     def start(self):
@@ -85,7 +85,7 @@ class Downloader:
         self.average_speed = 0
         self.time_left = "00:00:00"  # Based on average speed
         self.last_size = 0
-        self.last_check_time = 0
+        self.last_check_time = 0.0
         self.last_speeds = []
         self.speed_check_time = 0
         self.time_left_check_time = 0
@@ -156,7 +156,7 @@ class Downloader:
             logger.exception("Download failed: %s", ex)
             self.on_download_failed(ex)
 
-    def on_download_failed(self, error):
+    def on_download_failed(self, error: Exception):
         # Cancelling closes the file, which can result in an
         # error. If so, we just remain cancelled.
         if self.state != self.CANCELLED:
@@ -217,7 +217,7 @@ class Downloader:
         self.speed_check_time = get_time()
         return speed, average_speed
 
-    def get_average_time_left(self):
+    def get_average_time_left(self) -> str:
         """Return average download time left as string."""
         if not self.full_size:
             return "???"