diff --git a/PLATFORM_IDs.md b/PLATFORM_IDs.md
new file mode 100644
index 0000000..bb05a36
--- /dev/null
+++ b/PLATFORM_IDs.md
@@ -0,0 +1 @@
+### PLATFORM ID LIST
diff --git a/README.md b/README.md
index fcd0775..978a6e8 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,12 @@ The provided features are:
     - receiving and sending chat messages
 - cache storage
 
+## Platform Id's
+
+Each integration can implement only one platform.
+
+[Contribution guidelines for this project](PLATFORM_IDs.md)
+
 ## Basic usage
 
 Eeach integration should inherit from the :class:`~galaxy.api.plugin.Plugin` class. Supported methods like :meth:`~galaxy.api.plugin.Plugin.get_owned_games` should be overwritten - they are called from the GOG Galaxy client in the appropriate times.