diff --git a/apps/amethyst/lib/api/game.ex b/apps/amethyst/lib/api/game.ex
index 6f651f3..4cca9a2 100644
--- a/apps/amethyst/lib/api/game.ex
+++ b/apps/amethyst/lib/api/game.ex
@@ -31,6 +31,9 @@ defmodule Amethyst.API.Game do
   `login/3` is called when a new player logs into a game instance.
   You may either :accept or :reject the player for whatever reason, avoid
   rejecting the player in your default game as that will disconnect the player.
+
+  Note that if no new players can join for any reason, your game should return false from `joinable?/1`.
+
   The PID received in 'from' will be the one that calls all callbacks
   caused directly by this player, such as their movement or interactions --
   You can expect that PID to never be used by any other player and that this same
diff --git a/apps/amethyst/test/game_coordinator_test.exs b/apps/amethyst/test/game_coordinator_test.exs
index 160b64c..5963864 100644
--- a/apps/amethyst/test/game_coordinator_test.exs
+++ b/apps/amethyst/test/game_coordinator_test.exs
@@ -13,7 +13,7 @@ defmodule GameCoordinatorTestGame do
 
   @impl true
   def login(from, cfg, refs) do
-    :ok
+    :accept
   end
 
   @impl true
diff --git a/apps/example_game/lib/example/game.ex b/apps/example_game/lib/example/game.ex
index 78df9f7..247039e 100644
--- a/apps/example_game/lib/example/game.ex
+++ b/apps/example_game/lib/example/game.ex
@@ -12,7 +12,7 @@ defmodule Example.Game do
   def login(from, cfg, refs) do
     Logger.info("Player logged in from #{inspect(from)}: #{inspect(cfg)}")
     Logger.info("The refs for this game are #{inspect(refs)}")
-    :ok
+    :accept
   end
 
   @impl true