diff --git a/HISTORY.rst b/HISTORY.rst
index 3b290650..637fd75e 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -19,6 +19,7 @@ PlatformIO Core 4.0
   - Added support for `PVS-Studio <https://docs.platformio.org/page/plus/check-tools/pvs-studio.html>`__ static code analyzer
 
 * Control debug flags and optimization level with a new `debug_build_flags <https://docs.platformio.org/page/projectconf/section_env_debug.html#debug-build-flags>`__ option
+* Install a dev-platform with ALL declared packages using a new ``--with-all-packages`` option for `pio platform install <https://docs.platformio.org/page/userguide/platforms/cmd_install.html>`__ command  (`issue #3345 <https://github.com/platformio/platformio-core/issues/3345>`_)
 * Added support for "pythonPackages" in `platform.json <https://docs.platformio.org/page/platforms/creating_platform.html#manifest-file-platform-json>`__ manifest (PlatformIO Package Manager will install dependent Python packages from PyPi registry automatically when dev-platform is installed)
 * Handle project configuration (monitor, test, and upload options) for PIO Remote commands (`issue #2591 <https://github.com/platformio/platformio-core/issues/2591>`_)
 * Updated SCons tool to 3.1.2
diff --git a/docs b/docs
index cfc5eed0..7b3bc149 160000
--- a/docs
+++ b/docs
@@ -1 +1 @@
-Subproject commit cfc5eed060900a8b5510c23e269b773019e3882f
+Subproject commit 7b3bc1494aed26fd2e33940bc44dd81b9231a115
diff --git a/platformio/commands/platform.py b/platformio/commands/platform.py
index c094b560..d4ff4930 100644
--- a/platformio/commands/platform.py
+++ b/platformio/commands/platform.py
@@ -299,14 +299,20 @@ def platform_show(platform, json_output):  # pylint: disable=too-many-branches
 @click.option("--with-package", multiple=True)
 @click.option("--without-package", multiple=True)
 @click.option("--skip-default-package", is_flag=True)
+@click.option("--with-all-packages", is_flag=True)
 @click.option(
     "-f",
     "--force",
     is_flag=True,
     help="Reinstall/redownload dev/platform and its packages if exist",
 )
-def platform_install(
-    platforms, with_package, without_package, skip_default_package, force
+def platform_install(  # pylint: disable=too-many-arguments
+    platforms,
+    with_package,
+    without_package,
+    skip_default_package,
+    with_all_packages,
+    force,
 ):
     pm = PlatformManager()
     for platform in platforms:
@@ -315,6 +321,7 @@ def platform_install(
             with_packages=with_package,
             without_packages=without_package,
             skip_default_package=skip_default_package,
+            with_all_packages=with_all_packages,
             force=force,
         ):
             click.secho(
diff --git a/platformio/managers/platform.py b/platformio/managers/platform.py
index 983cab50..8f23f1bd 100644
--- a/platformio/managers/platform.py
+++ b/platformio/managers/platform.py
@@ -74,6 +74,7 @@ class PlatformManager(BasePkgManager):
         with_packages=None,
         without_packages=None,
         skip_default_package=False,
+        with_all_packages=False,
         after_update=False,
         silent=False,
         force=False,
@@ -84,6 +85,9 @@ class PlatformManager(BasePkgManager):
         )
         p = PlatformFactory.newPlatform(platform_dir)
 
+        if with_all_packages:
+            with_packages = list(p.packages.keys())
+
         # don't cleanup packages or install them after update
         # we check packages for updates in def update()
         if after_update: