Amend

docs/source/usage/installation.rst

@@ -1,2 +1,58 @@
 Installation
 ============
+
+
+Install TorchRL
+---------------
+
+You can install TorchRL from PyPi.
+
+.. code-block:: console
+
+   pip install torchrl
+
+For more details, or for installing nightly versions, see the
+`TorchRL installation guide <https://github.com/pytorch/rl#installation>`_.
+
+Install BenchMARL
+-----------------
+
+You can just install it from github
+
+.. code-block:: console
+
+   pip install benchmarl
+
+Or also clone it locally to access the configs and scripts
+.. code-block:: console
+
+    git clone https://github.com/facebookresearch/BenchMARL.git
+    pip install -e BenchMARL
+
+Install environments
+--------------------
+
+All enviornment dependencies are optional in BenchMARL and can be installed separately.
+
+VMAS
+^^^^
+
+.. code-block:: console
+
+   pip install vmas
+
+PettingZoo
+^^^^^^^^^^
+
+.. code-block:: console
+
+   pip install "pettingzoo[all]"
+
+
+SMACv2
+^^^^^^
+
+Follow the instructions on the environment `repository <https://github.com/oxwhirl/smacv2>`_.
+
+`Here <https://github.com/facebookresearch/BenchMARL/blob/main/.github/unittest/install_smacv2.sh>`_
+is how we install it on linux.